The updated GLK is a small but posh SUV that's quick and agile. After a freshening for 2013, the GLK scored much higher than the original version we tested in 2009. It also got a revised interior that felt more substantial and luxurious. Its tidy size, responsive handling, and good visibility make it easy to maneuver and handy in the city. The GLK feels solid on the highway, rides well for the most part and is quiet.
Alerts
There are 6 recalls on this vehicle. Learn More.

Road Test Results

Performance
Acceleration Acceleration Acceleration tests are conducted on a smooth, flat pavement straightaway at the track. Time, speed, and distance measurements are taken with a precise GPS-based device that’s hooked to a data-logging computer.
0 to 60 mph 0 to 60 mph (sec.) The time in seconds that a vehicle takes to reach 60 mph from a standstill with the engine idling.
Transmission Transmission Transmission performance is determined by shifting smoothness, response, shifter action, and clutch actuation for manual transmissions.
Fuel Economy Fuel Economy We perform our own fuel-economy tests, independent of the government's often-quoted EPA figures and the manufacturers' claims. Using a precise fuel-flow measuring device spliced into the fuel line, we run two separate circuits to represent city and highway consumption.
CR's Overall Mileage CR's Overall Mileage CR's overall mileage is a composite of measured fuel usage on a prescribed city course and highway cruising; and CR's 150-mile test trip of mixed driving, if tested. In recent road tests, we've discontinued the 150-mile trip test.
CR's City Mileage CR's City Mileage Measured fuel usage on a prescribed city course.
CR's Highway Mileage CR's Highway Mileage Measured fuel usage on a prescribed highway cruising.
Annual Fuel Cost Annual Fuel Cost The cost and amount of fuel used in 12,000 miles and is calculated from CR's overall mileage.
Braking Braking The braking rating is a composite of wet and dry stopping distances and pedal feel. Braking distance is from 60 mph, with no wheels locked.
Emergency Handling Emergency Handling Several factors go into the rating, including the avoidance maneuver speed and confidence, as well as how the vehicle behaves when pushed to its limit.
Comfort / Convenience
Ride Ride Our expert judgment of how well the suspension isolates and absorbs road imperfections and how steady it keeps the body on various road surfaces.
Noise Noise Our expert judgment of the vehicle's interior noise level in everyday driving.
Front Seat Comfort Front Seat Comfort Our judgment of how comfortable the front seat is for drivers of various heights.
Rear Seat Comfort Rear Seat Comfort Our judgment of how comfortable the rear seat is for two passengers to sit across.
Interior Fit and Finish Interior Fit and Finish An expert evaluation of the interior quality and craftsmanship.
Trunk/Cargo Area Trunk/Cargo Area Our rating is based on the amount of luggage or cargo space that a vehicle has in the trunk or cargo area.

Owner Reports

Worse Better
Reliability History Reliability History The reliability charts are based on responses on hundreds of thousands of vehicles from our latest Annual Auto Survey. Consumer Reports subscribers reported on any serious problems they had with their vehicles during the past 12 months that they considered serious because of cost, failure, safety, or downtime, in any of the trouble spots included in the table below. The results are presented relative to the average model that year. Extra weight is given to the more serious areas such as major engine or transmission problems. Based on this data and further analysis, we predict reliability for the latest year. N/A indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year.
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
NA
2011
NA
2012
NA
2013
2014
2015
2016
2017
2018
2019
2020
Reliability Trouble Spots
Engine Major Engine Major Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.
NA
Engine Minor Engine Minor Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, oil leaks.
NA
Engine Cooling Engine Cooling Radiator, cooling fan, antifreeze leaks, water pump, thermostat, overheating.
NA
Transmission Major Transmission Major Transmission rebuild or replacement, torque converter, clutch replacement.
NA
Owner Satisfaction Owner Satisfaction To learn about satisfaction, CR has collected survey data from our annual survey on more than half a million vehicles. Our subscribers provide great insights into their satisfaction by answering one simple question: If they had it to do all over again, would they definitely buy or lease the same model? In addition, respondents also rate their cars in six categories: driving experience, comfort, value, styling, audio, and climate systems. N/A indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year.
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
Driving Experience Driving Experience Includes acceleration and handling
Comfort Comfort Includes seats, climate control, noise, and ride
Value Value Did you get what you wanted relative to the price you paid?
Styling Styling How it looks inside and out
Safety Equipment
ABS and ESC standard. Side and head protection air bags standard.
Road Test

The updated GLK is a small but posh SUV that's quick and agile. After a freshening for 2013, the GLK scored much higher than the original version we tested in 2009. It also got a revised interior that felt more substantial and luxurious.

Its tidy size, responsive handling, and good visibility make it easy to maneuver and handy in the city. The GLK feels solid on the highway, rides well for the most part and is quiet. On top of all that, it's extremely quick and gets a respectable 21 mpg. The diesel version got considerably better mileage, but without the brisk acceleration.

Seating
2 front, 3 rear
Drive Wheels
AWD , Rear
Warranty

In most cases, automotive warranties are based on the vehicle identification number (VIN), and the warranty will be valid regardless of ownership. The dealership can tell you exactly how much warranty is left.

Read more about extended warranties
Body Styles
4-door SUV
Transmissions Available
  • 7-speed Automatic
Engines Available
  • 2.1-liter 4 turbodiesel (200 hp)
  • 3.5-liter V6 (302 hp)

Owner Reported Trouble Spots

The Reliability score is based on our latest subscriber survey of 2015 Mercedes-Benz GLK-Class owners. The owner comments describe problems respondents experienced with this vehicle.

Fuel System

Check engine light, sensors (includes O2 or oxygen sensor), emission control devices (includes EGR), engine computer, engine computer, fuel cap, fuel gauge/sender, fuel injection system, fuel pump, fuel leaks, stalling or hesitation.

What Owners Say

Emission control devices (includes EGR)

"catalytic converter replaced"

R F., PA (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"In the first year, this vehicle went back to shop repeatedly with engine warning light. Was told it was emissions system. At some point, the soot filter was finally replaced and it's been fine"

Curtis M., FL (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"The NOx sensors were sending erroneous indications to the computer, threatening to shut the vehicle down."

James S., ON (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"DPF failed. Was under warranty, but out of pocket would have been more than $3,000."

David R., WA (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"The GLK-250 is a diesel engine and uses Urea (ADBLUE) injection to reduce nitrogen dioxide - either a sensor or an issue with the EGR caused the system to inject too much Urea into the system. This resulted in a noticeable smell of urea from the tailpipe of the vehicle. According to the maintenance manager at the MERCEDES-BENZ Dealer - this could result, over time, in causing the catalytic converter to fail. It required a replacement of the EGR and the sensors connected with the urea process. Luckily the vehicle was still under warranty. It took about 3 months for the dealer to get the parts in and schedule the repair. It seemed to be a common occurrence with the year model and there was a demand for the replacement of the parts. The vehicle did not stop or run rough while we waited for the part. The dealer promised to replace the catalytic converter if there was any demonstrable damage to it while we waited for the part."

Anonymous, KY (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"The diesel scrubber sensor has had consistent problems since purchase."

Anonymous, CA (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"Engine light came on and nitrous oxide sensor had to be replaced"

Anonymous, OH (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"sensor re: exhaust"

John B., IA (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"Soot buildup in exhaust system"

Anonymous, MO (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"Diesel emissions control modules in the exhaust system failed."

Anonymous, (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)
Sensors (includes O2 or oxygen sensor)

"sensor issue, not sure what but had 3 or 4 of these since bought car in 2015"

Mike B., IA (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"Frequent replacement of NOS sensors."

Anonymous, FL (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"The NOx sensors were sending erroneous indications to the computer, threatening to shut the vehicle down."

James S., ON (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"Diesel soot sensor failed. Under warranty, but out of pocket cost would have been quite high. This is the second major emissions system failure in 12 months."

David R., WA (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"Issue with the sensor detecting the amount of Ammonia available for the diesel engine"

Anonymous, CA (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"Sensor went off. We had to take the car in to be checked. It was a momentary blip (the mechanics said) but the light stays on until investigated"

Anonymous, MB (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"Within last year, have had to have four Nox sensors replaced"

Anonymous, QC (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"Soot buildup"

Anonymous, MO (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"nitrous oxide sensor failed"

Anonymous, NB (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"It's a bigger issue than MB will admit"

Anonymous, NY (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

Brakes

Antilock system (ABS), parking brake, master cylinder, calipers, rotors, pulsation or vibration, squeaking, brake failure or wear.

What Owners Say

Normal routine brake wear

"Normal wear at 50k"

Anonymous, (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"Routine break wear. Had rotors replaced."

Anonymous, FL (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)
Parking brake

"Parking brack assemby froze and was replaced under warranty"

Anonymous, NJ (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

"The electronic system of the parking break was faulted"

Anonymous, CA (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)
Premature brake wear

"The previous owner must have used the brakes excessively because we have seen no problems after the replacement"

Anonymous, TX (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

"The brake pads needed to be replaced after 51000km. In the process the rotors were replaced as well"

Anonymous, BC (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"Brakes replaced 3 times"

Anonymous, PA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)
Pulsation or vibration

"braking from freeway speeds caused the out of round rotors to vibrate the steering wheel and vehicle. they needed to be replaced - which is very annoying because they wouldn't turn the rotors - they insisted on replacing the entire set up"

Mark H., CA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

"Dealer didnt cover the repair when this happened when its still under 5yrs"

Cash I., NV (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

"decelerating from freeway speeds caused front wheel vibration. The rotors and break pads were replaced which corrected the problem"

Anonymous, CA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)
Rotors

"braking from freeway speeds caused the out of round rotors to vibrate the steering wheel and vehicle. they needed to be replaced - which is very annoying because they wouldn't turn the rotors - they insisted on replacing the entire set up"

Mark H., CA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

"The two front rotors needed replacement because of excessive wear and the pulsation problems. The used car dealer where we purchased the car replaced all four rotors and pads for the cost of the parts which was just under $300. I am still amazed about this because the Mercedes dealership quoted over $2000 for the front rotors alone"

Anonymous, TX (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

"they needed to be replaced prematurely"

Anonymous, CA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)
Squeaking

"Noisy brakes"

Anonymous, NS (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

Suspension

Shocks or struts, ball joints, tie rods, wheel bearings, alignment, steering linkage (includes rack and pinion), power steering (pumps and hoses, leaks), wheel balance, springs or torsion bars, bushings, electronic or air suspension.

What Owners Say

Alignment

"frequent need for four wheel alignments and tire rotations not covered under warranty brings into question what "crossover SUV" means"

Anonymous, CA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

"Went through two sets of tires in less than a year because alignment was off due to previously mentioned A frame issues."

Anonymous, (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)
Shocks or struts

"Front struts went within 12m of CPO purchase. Was not covered by warranty but MERCEDES-BENZ completed the repairs on good faith for no cost. Disappointed to see such a large repair so early, but happy to see MERCEDES-BENZ response to the incident"

Anonymous, MA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

"Right rear strut was causing a rattling sound. It was replaced under warranty."

Anonymous, CA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

"Strut noise replaced under extended warranty"

Anonymous, (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)
Springs or torsion bars

"Entire driver side A-frame assembly was replaced due to a severe crack in the metal. It took almost a year of service calls before they finally identified and repaired it."

Anonymous, (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

Transmission Minor

Gear selector or linkage, leaks, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission.

What Owners Say

Gear selector or linkage

"when you come to a stop after a few seconds there is a thud. the dealer reprogrammed the software and lubricated the transmission last year, the problem is now back again and the car will go back to the dealer"

Anonymous, NY (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"car transmission would thud or thump after coming to stop. Car was diagnosed for software update and lubrication and adjustment of linkage. Problem re occurred and same solution recommended. since second repair no issues returned."

Anonymous, NY (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)
Transmission computer

"included with previous issue both times software was updated on transmission"

Anonymous, NY (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"The car was going into what the dealer called "limp mode" repeatedly. As I recall, I was told a "chip" had to be replaced in the transmission computer. In any event, once I was replaced, it has been great ever since"

Phyllis L., OR (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

"Transmission shift points between 3 to 4 were jerky."

Anonymous, FL (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

Engine Minor

Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, oil leaks.

What Owners Say

Engine computer

"The engine light was on which didn't affect driving. The problem was fixed by the dealership in replacing the gas pedal"

Anonymous, BC (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

"Driving on turnpike at 70mph the engine cut off. We had to coast to a stop, luckily there was little traffic (we were in a rural area) but it was scary. We waited a few minutes and started the car again, and it was fine - got us home that day. When I called M.B. For an appointment they said this was a recall problem, and they fixed it immediately. No problem since then"

Anonymous, VA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

""service engine" light comes on sporadically, often accompanied by a distinct "miss" on one or more cylinders.Was serviced and told software needed updating. Worked for about 1000 miles, and is in the shop again"

Anonymous, TX (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)
Oil leaks

"Oil pan had to be replaced. The washer fluid pump had to be replaced"

A C., NJ (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

Body Hardware

Power or manual windows, locks and latches, tailgate, hatch or trunk, doors or sliding doors, mirrors, seat controls, safety belts, sunroof, convertible top.

What Owners Say

Doors or sliding doors

"The doors have very sharp corners where the side meets the bottom. Mercedes dealership fixed the worst part but it definitely is not made like Mercedes used to make vehicles"

Anonymous, CA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)
Locks and latches

"The driver door latch would not lock the door with the electronic control. It would lock manually."

Anonymous, CA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)
Windows

"Driver window would not close. Motor replaced"

Anonymous, ON (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

In-car Electronics

CD or DVD players, radio, speakers, GPS, communication system (e.g., OnStar), display screen freezes or goes blank, phone pairing (e.g. Bluetooth), voice control commands, steering wheel controls, portable music device interface (e.g., iPod/MP3 player), backup or other camera/sensors.

What Owners Say

Backup or other camera/sensors

"Lane assist failed twice"

T C., ON (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)
In-dash navigation system (GPS)

"Navigation system is NOT user friendly. It is difficult to operate even by tech savvy people."

Anonymous, NV (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)
Software update fixes

"When putting up the power window on the passenger side it went up and the came down about 1/4 inch. This happened twice and just require a software fix."

Anonymous, (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

Engine Cooling

Radiator, cooling fan, antifreeze leaks, water pump, thermostat, overheating.

What Owners Say

Antifreeze leaks

"leak in the return hose"

A C., NJ (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)
Thermostat

"The engine heat sensor broke down"

Anonymous, BC (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)
Water pump

"Pump leaking. Was replaced. Power steering connexion was also leaking and was fixed at the same time"

Anonymous, QC (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

Climate System

Blower (fan) motor, A/C compressor, condenser, evaporator, heater system, automatic climate control, refrigerant leakage, electrical failure.

What Owners Say

Blower (fan) motor

"Blower is loud as if obstructed"

Anonymous, DE (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

"Vehicle less than a month old and failed"

Jim C., NS (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

Power Equipment

Cruise control, clock, warning lights, body control module, keyless entry, wiper motor or washer, tire pressure monitor, interior or exterior lights, horn, gauges, 12V power plug, remote engine start, alarm or security system

What Owners Say

Battery (not hybrid or electric)

"Could not start engine due to low battery charge"

Anonymous, HI (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)
Electronic ignition

"Two instances of replacing ignition coils. Car towed twice"

Anonymous, PA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

Drive System

Driveshaft or axle, CV joint, differential, transfer case, 4WD/AWD components, driveline vibration, traction control, electronic stability control (ESC), electrical failure.

What Owners Say

Stability control (ESC)

"The ESC system and other system warning lights went off, forcing the car into limp mode, third gear only driving. Was told it was speed sensors in the wheels. So not sure if it is ESC or transmission problem. In addition, the brake discs warped at 19K miles and were replaced, no charge. The emissions systems repeatedly signaled trouble with an engine warning light and was finally repaired. But it drives great and gets great mileage"

Curtis M., FL (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

Engine Major

Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.

What Owners Say

Turbo or supercharger

"Split hose"

Anonymous, NY (2015 Mercedes-Benz GLK-Class GLK250 2.1-L 4 Cyl diesel)

Exhaust

Muffler, pipes, catalytic converter, exhaust manifold, leaks.

What Owners Say

Other/unsure

"Functions got messed up at times. Fixed by software update"

Robert F., CA (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

Transmission Major

Transmission rebuild or replacement, torque converter, clutch replacement.

What Owners Say

Transmission rebuild or replacement

"Transmission started making a noise that got faster and louder the higher the speed"

Charles D., MO (2015 Mercedes-Benz GLK-Class GLK350 3.5-L V6)

Body Integrity

Squeaks, rattles, wind noises, loose or cracked seals and/or weather-stripping, air and water leaks.

Paint/Trim

Paint (fading, chalking, cracking, or peeling), loose interior and exterior trim or moldings, rust.

Electric System

Alternator, starter, hybrid battery and related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, distributor or rotor failure, spark plugs and wires failure.

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