There are 2 stored owner reports matching the fuel system leading-label group for the 2014 Mercedes-Benz CLA-Class in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)STRONG GASOLINE ODOR INSIDE THE CAR. DEALER REMOVED THE REAR SEAT. REMOVED LEFT AND RIGHT FUEL TANK ACCESS COVERS. FOUND SUCTION JET PUMP AREA WET WITH GASOLINE. FOUND THE FUEL SENDING UNIT LEFT SIDE CRACKED AND LEAKING. THEY RECOMMENDED REPLACING SUCTION JET PUMP AND AUXILIARY PUMP COSTING $1,571.00. THE SMELL IS CONSTANT WHETHER MOVING OR NOT AND REGARDLESS OF LOCATION. I COUGH WHEN DRIVING THE CAR HENCE I SELDOM USE IT. IF I CAN NOT AVOID USING THE CAR I OPEN ALL WINDOWS AND TELL ANY PASSENGER TO AVOID SMOKING TO PREVENT FIRE. I STARTED TO NOTICE THIS ISSUE MID AUGUST 2020.
I HAVE PARTIAL VIDEO IF THIS INCIDENT. INCIDENT OCCURRED AT 991 ODOMETER MILES. AFTER DRIVING APPROX. ~300 MOSTLY CONTIGUOUS, FLAT, RURAL HIGHWAY MILES IN-BETWEEN LINCOLN, NE AND ST. LOUIS, MO (HEADING TO ATLANTA, GA) IN APPROX. 30 WEATHER ON DRY PAVEMENT, THE ENGINE STOPPED PRODUCING ENOUGH ENGINE POWER TO PROPEL THE VEHICLE AT THE 70-75 MPH THAT I WAS TRAVELING. AT APPROX. 60-65 MPH, I APPLIED ADDITIONAL PRESSURE TO THE GAS PEDAL WHICH WAS NOT EFFECTIVE. PUSHING THE GAS PEDAL TO THE FLOOR DID NOTHING EXCEPT, OCCASIONALLY, THE TRANSMISSION WOULD SWITCH QUICKLY IN-BETWEEN THE SAME TWO GEARS, WHICH REGISTERED SLIGHTLY ON THE TACHOMETER BUT DID NOTHING TO ACCELERATE THE VEHICLE OR MAINTAIN SPEED. IT ALMOST FELT AS IF THE TRACTION CONTROL WAS ACTIVATING (BUT MALFUNCTIONING) DESPITE THE GROUND BEING TOTALLY DRY. BY APPROX. 50 MPH I WAS BEING FLANKED AND TAILGATED BY TWO CLEARLY DISGRUNTLED SEMI-TRUCKS AS I TRIED TO PULL OVER TO THE RIGHT. THE VEHICLE SEEMINGLY WOULD MAINTAIN A MAX. OF 35 MPH. UPON RESTARTING THE CAR (NORMAL START), LETTING IT IDLE (NORMAL IDLE), AND THEN ATTEMPTING TO DRIVE TO A SAFER LOCATION, ITS ACCELERATION FELT RESTRICTED AT LOWER RPMS, BUT IT DID BACK UP TO HIGHWAY SPEED AND THE RESTRICTED FEELING ENDED UP BEING TEMPORARY. THE NEAREST DEALER WAS MB OF MARION, IL., APPROX. ANOTHER 200-300 MILES AWAY. ON THE WAY TO THIS DEALERSHIP, THE SAME MALFUNCTION OCCURRED AGAIN ABOUT 50-75 MILES LATER. I WENT THROUGH THE SAME PROCESS AND RESTARTED THE VEHICLE. AT THE MARION, IL DEALER, THE MECHANIC FOUND THE FOLLOWING CODE IN THE COMPUTER: PO29921 - BOOST PRESSURE OF TURBOCHARGER TOO LOW. THE MECHANIC AT THE MARION, IL DEALER AND, LATER, AT ANOTHER DEALER CLOSER TO WHERE I LIVE (MERCEDES OF SOUTH ATLANTA) WAS NOT ABLE TO REPLICATE THIS CODE AND THEREFORE NO REPAIRS HAVE EVER BEEN ATTEMPTED OR MADE. THIS ISSUE HAS NOT RE-OCCURRED HERE IN GEORGIA. *TR
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.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Aug 31, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.