There are 5 owner-reported engine complaints for the 2018 Mercedes-Benz CLA-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Corrosion of the fuel system (on a Flex Fuel rated vehicle that had used E85 blend regularly) causing sudden loss of power, misfires, lack of acceleration The vehicle experience sudden loss of power, multiple misfires, and potential damage to the engine. Had the vehicle been on the highway or attempting to merge with traffic this could have resulted in an accident See attached dealer diagnosis and replacement of multiple fuel injectors, fuel pump, and fuel rail. The dealer service manager stated (but did not document) that this was probably caused by using E85, despite the fact that the vehicle is rated for E85/flex fuel There were no warnings or indications prior to the incident
P052E Check Engine light on. Same part is defective on other models that use the same parts. My car is not included in the recall.
Check engine code PO52E - Positive Crankcase Ventilation regulator valve performance. Needs to be recalled
The contact owns a 2018 Mercedes-Benz CLA250. The contact stated that coolant was leaking from the engine with the check engine warning light illuminated. The vehicle was taken to an independent mechanic where the mechanic replaced the coolant reservoir cap. Several months later, the warning light re-appeared, and the contact topped off the coolant level and the warning light disappeared. Recently, the check engine warning light illuminated and took the vehicle back to the independent mechanic. The vehicle was diagnosed with a defective fuel injector and the contact was referred to the manufacturer for assistance. The contact was informed that the vehicle was not under recall and was referred to the NHTSA Hotline for assistance. The vehicle was not repaired. The failure mileage was approximately 118,000.
AS I ACCELERATED OUT OF A LEFT TURN, THE ENGINE SUDDENLY SHUT OFF, THE TRANSMISSION SHIFTED INTO NEUTRAL, AND THE DASH INDICATED THAT THE VEHICLE WAS 'INOPERABLE'. I PULLED OVER AND TURNED OFF THE IGNITION. WHEN I ATTEMPTED TO RESTART, THE VEHICLE STARTED WITH NO ISSUES.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.