I was trying to merge onto a freeway from a complete stop and because this freeway has an extremely short on-ramp, you need to get up to a high speed in very little time. As such, I put my car in Sport driving mode and accelerated very hard from a complete stop. The car accelerated as normal for a few seconds (I reached approximately 40 to 50 MPH), then I felt the car lag and felt a loss of power. The car was in limp mode and I couldn-??t accelerate even though I was pressing the gas pedal all the way to the floor. A few seconds after this occurred, I notice that the check engine light turned on. I was able to maintain a speed around 50 MPH and got off the freeway. I took my car to both the Mercedes dealership and an independent mechanic and both diagnosed a failure of the high pressure fuel pump. I also tried to see if this will happen again and after hard acceleration in regular driving mode, the exact same issues occurred. I have read that there are issues with the high pressure fuel pump with my car model and I ask that you guys please investigate thoroughly to see if a recall would be necessary. Losing power while accelerating is extremely dangerous and a huge safety hazard for all drivers on the road. I could have easily been rear ended by another driver since I couldn-??t accelerate to a faster speed. I have not yet replaced the high pressure fuel pump but plan to do so in the next few days. Attached is the diagnostic invoice from the Mercedes dealership. As stated on the invoice, please note that my car only has 43,000 miles, which makes the high pressure fuel pump failure very surprising.

- Arcadia, CA, USA

While slowing to approach a parking space, the car sped forward and jump the curve crashing into a storefront. No one injured. Stepping on the brakes did not stop or even slow down the car.

- Miami, FL, USA

The contact owns a 2014 Mercedes Benz C250. While driving approximately 65 mph, a warning light illuminated and the vehicle decelerated and became inoperable. The vehicle was able to be restarted and was towed by the dealer, who was not able to diagnose the failure. The vehicle was not repaired. The manufacturer was notified. The approximate failure mileage was 10,000.

- Victor, NY, USA

I purchased this C250 in Dec 2013, have 3 similar occurrence were the engine failed to respond. Once coming out of a light, and twice on I-95 both times trying to switch lanes to get out of on coming traffic, and on both occasions the vehicle did not respond to the gas pedal. One of the incidents occurred with cruise control engaged. We were lucky were not killed by the semi tractor trailers. Am a retire air force firefighter and I have seen some horrible stuff on the highways, thank god it was not meant to be those days. I contacted Mercedes-Benz usa hq. On all these safety occurrence below and all [xxx] at hq 1 800 367 6372 [xxx] would tell me is that vehicle was under warranty.... on the last time it happen they said the new engine had backfired and they were going the replace a fuel port or something... in this new vehicle. Engine 3X, new brakes, alignment, dead battery, tan leather turning blue. Thanks in advance. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Pinehurst, NC, USA