There are 7 owner-reported engine complaints for the 2016 Mercedes-Benz CLA-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The contact owns a 2016 Mercedes-Benz CLA250. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer where it was diagnosed with a failed thermostat. The contact was informed that the thermostat needed to be replaced. The vehicle was not repaired. The vehicle was driven to the residence. The contact performed an inspection on the vehicle and determined there was a melted hole in the air intake valve. The contact stated that the dealer had not provided information of the condition of the melted air intake valve. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 116,000.
My car has slipped into neutral twice while driving. Once while turning left from red light and once while sitting still at red light.
The contact owns a 2016 Mercedes-Benz CLA250. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer where it was diagnosed that the regulator valve had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHSTA Hotline for assistance. The failure mileage was approximately 50,000.
Code: 052E71 - Valve for crankcase ventilation has a malfunction or block. This car has 48, 182 miles and is requiring $2000 worth of repairs.
MY 2016 MERCEDES-BENZ C300 AFTER UNDERGOING THE RECOMMENDED MAINTENANCE VIA THE MERCEDES-BENZ DEALER, WHILE DRIVING DOWN THE PUBLIC ROAD LOST POWER, THE LOST OF POWER WITH NO WARNING TO ME OR ANY OTHER DRIVERS AROUND ME, THE VEHICLE WENT FROM 45 MPH TO 10 MPH THIS WAS DUE TO A DECENTIGRATING PISTON, THE VEHICLE MANUFACTURE ADVERTISED THAT THE VEHICLE WOULD CUT POWER TO PROTECT THE ENGINE FROM CAUSING IT SELF FURTHER DAMAGE, THIS SEEMED LIKE A GREAT SAFETY FEATURE UNTIL IT JUST HAPPEN, I HAD NO CONTROL OVER THE VEHICLE, IT JUST SEEMED TO TAKE ON A LIFE OF ITS OWN, THE VEHICLES BEHIND OR ADJACENT TO ME HAD NO WARNING THAT THE VEHICLE WOULD DECREASE THE SPEED, SO I HAD TO MUSCLE THE CARE OUT OF THE SWIRLING TRAFFIC, I WAS DEVISTATED THAT MY CAR CAUSED ME SUCH FEAR AND DEALING WITH THE FACT THAT THE CAR COULD HAVE KILLED ME OR SOME ONE ELSE NEAR ME, I HAD THE VEHICLE TOWED TO THE LOCAL DEALER WHO HAD SERVICED THE VEHICLE SINCE IT WAS NEW AND THE DEALER EXPLAINED THAT THE PISTON IN THE INTERNAL COMBUSTION ENGINE HAD DECENTAGRATED THUS CAUSING METAL SHAVINGS TO BE DISTRIBUTED THROUGHOUT THE REST OF THE ENGINE, AND I WOULD BE CHARGED FOR THE TOTAL COST OF THE REPAIR OF THE ENGINE. IT APPEARED THAT THIS SHOULD HAVE BEEN DISCLOSED TO THE OWNER OF THE VEHICLE OR PLACED IN THE OWNERS MANUAL, BUT THE ONLY RESPONSE FROM MERCEDES WAS WE CHANGE OUT THESE ENGINES ALL THE TIME THEY ALWAYS BLOW ENGINES, YOU CAN CALL MERCEDES-BENZ ADVOCACY TO DISCUS THE WARRANTY FROM WHICH I NEVER RECEIVE A RESPONSE. IF THE MANUFACTURE PLACES KNOW BAD PARTS IN TO A VEHICLE AND SALES IT TO THE PUBLIC, THEN THAT MANUFACTURE SHOULD HAVE TO PAY FOR THE REPAIRS OF THE CUSTOMERS VEHICLES EITHER INDIVIDUALLY OR THRU A RECALL PROCESS.
WATER PUMP CRACKS IN VERY COLD WEATHER OVER HEATS WHILE IN DRIVE AND FLOODS INTO ENGINE
IF SOMETHING IN THE ROADWAY HITS THE OIL PAN IT WILL CRACK AND CAUSING THE ENGINE TO LOCK UP WITHOUT NOTICE. IT SEEMS THERE SHOULD BE SOMETHING PROTECTING THE OIL PAN PREVENTING THIS FROM HAPPENING AND MORE TIME NOTIFYING OF LOW OIL SHOULD BE ALLOWED TO MOVE OFF THE ROAD WAY AND SHUT THE ENGINE DOWN. I ALSO QUESTION THE STRENGTH OF THE MATERIAL OR DESIGN OF THE OIL PAN.
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.
Data synced from NHTSA on Apr 25, 2026