Gasoline Fuel System Problems of Mercedes Benz CLA250

The contact owns a 2018 mercedes-benz Cla250. The contact stated while driving an undisclosed speed, an abnormally strong fuel odor was detected. Additionally, the fuel odor was also detected when the defroster and heat were activated. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure but informed the contact that there was no recall associated with the VIN. The contact related the failure to NHTSA campaign number: 21v961000 (fuel system, gasoline) however, the VIN was not included in the recall. The failure mileage was approximately 55,000.

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The contact owned a 2016 mercedes-benz Cla250c. The contact stated that while idled or driving at various speeds, she noticed a fuel odor throughout the vehicle. The fuel warning light illuminated indicating low fuel level and the abs warning intermittently illuminated. Additionally, the contact stated that after refueling the fuel tank, the fuel gauge remained on empty. The vehicle was not diagnosed or repaired. The dealer was notified of the failure and an appointment was scheduled. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 62,000.

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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.

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