2019 Mercedes-Benz GLC Reliability Score & Common Problems

Owners report two primary engine issues with the 2019 Mercedes-Benz GLC. The first involves the Positive Crankcase Ventilation (PCV) valve and the P052E71 code, which are linked to emissions problems and potential engine damage. This issue often manifests as a malfunctioning actuator and has been noted to occur around 52,880 miles. The second issue involves cracked pistons, reportedly due to faulty wrist pins in the M274 engine, leading to severe engine shaking and sudden power loss. This problem has been observed at similar mileage, with one incident occurring at 52,839 miles. Safety implications are significant, as the sudden loss of power at highway speeds poses a risk of collision. Multiple owners describe the need for costly repairs and mention that these issues are known among other Mercedes-Benz owners.

Owners of the 2019 Mercedes-Benz GLC frequently report issues related to the power train, with symptoms including stalling, unexpected acceleration, and jerking movements. Complaints often mention vehicles stalling or remaining in neutral when shifting from reverse to drive, and some report the vehicle rolling backward when stopped on a hill. Sudden speed reductions, as described in one report, occur without warning, posing a safety risk by unexpectedly slowing the vehicle on highways. These issues are typically reported around 50,000 to 63,500 miles. Safety implications include potential loss of control, as seen in cases of sudden deceleration or unintentional acceleration, although no crashes are reported. Buyers considering a used model should be aware of these recurring issues and the potential for costly repairs outside of warranty coverage.

Owners of the 2019 Mercedes-Benz GLC frequently report steering issues, particularly when turning the vehicle. Common symptoms include a juddering or knocking sound, shaking or vibrating of the steering wheel, and a sensation of the wheels skipping or getting stuck, especially noticeable when backing out of parking spaces. These issues have been noted at low mileages, with one report mentioning a failure at approximately 15 miles. While no crashes or loss of control are directly reported, the described symptoms suggest potential safety concerns, as owners feel the axle might break or the vehicle might hit something. Buyers considering this model should be aware of these steering-related complaints and the lack of resolution in some cases.

Owners report incidents of unintended acceleration in the 2019 Mercedes-Benz GLC, particularly during low-speed maneuvers. Complaints frequently mention the vehicle unexpectedly surging forward, leading to crashes, with one case involving a collision with a planter and another with a concrete planter box. Both incidents resulted in airbag deployment and injuries, with one owner noting that the Event Data Recorder indicated a 100% accelerator pedal position despite minimal driver input. These issues are reported at mileage around 48,000, suggesting potential safety risks during low-speed driving conditions, such as in parking lots. Buyers should be aware of these incidents when considering a used model.

Owners of the 2019 Mercedes-Benz GLC report issues with the vehicle's visibility components, specifically involving the sunroof and window mechanisms. One complaint describes the front stationary sunroof panel detaching while driving, posing a potential safety risk. Another owner mentions a malfunction with the driver's side window switch, which fractured during use, preventing the window from being lowered to clear fog, with the issue occurring around 27,500 miles. These reports suggest potential visibility and safety concerns related to component failure, particularly at higher mileages.

Owners of the 2019 Mercedes-Benz GLC report issues with the rearview camera failing to display an image while attempting to reverse. Complaints frequently mention that this issue occurs without any warning lights activating. The problem surfaces at higher mileages, with one report specifically noting it at 76,954 miles. While no accidents or injuries are reported, the lack of rearview camera functionality poses a potential safety risk by increasing the likelihood of backover incidents. Buyers considering this model should be aware of the possible need for a software update to address the camera issue.

Owners of the 2019 Mercedes-Benz GLC report two main visibility-related issues. First, there are instances of the moonroof spontaneously shattering while driving, even without any external impact or collision, which could pose a safety risk due to potential glass debris. Second, multiple owners describe persistent problems with windshield wipers skipping and failing to clear the windshield effectively, affecting visibility in wet conditions. These wiper issues persist despite replacement and adjustments by Mercedes-Benz, and no aftermarket wiper blades appear to fit the vehicle. The complaints do not specify mileage ranges, but they highlight ongoing visibility challenges that may impact driving safety.