While accelerating on the onramp to a SoCal freeway the car lurches and then goes into ‘limp mode’ and the check engine light appears. This happened with freeway speeds of +70 mph. Needless to say caused me to pull over to the side of the road, also very hazardous.

I was able to correct the limp mode issue by turning the key 5 times to clear the fault. Limping off the freeway is not an option as the next off ramp was past an interchange.

Sometime after, my wife received a letter from MBenz USA regarding Important Warranty Extension Information, High Pressure Fuel Pump, model years 2012 – 2014, including C250, C250 coupe, SLK250. This extended the warranty from the original to a ten-year, 120,000 mile coverage. If you’ve encountered this issue, contact your local MB dealer. The clock is ticking.

Bought a 2013 MB C250C (coupe). Two years old and still under warranty. Started noticing the lag and acceleration problem within a month of purchasing the car. Called the dealer, they ran tests and found nothing - told me this was normal for this car. I drive way more cautiously with this car than any other vehicle I have owned because I am afraid it will not pull into traffic or accelerate when I need it to. At times, I have my foot floored to get out of my neighborhood when traffic is heavy and more than once it has not responded and then jerked into high speed - very dangerous. After seeing multiple complaints about this, I am assured that I am not imagining this and I have driven other Turbo engines which never behaved this way. The issue does seem to be getting worse. I intend to mention it again with the dealer when the car will go in for the most recent recall issued Oct 16, 2017.