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.

- Stockbridge, GA, USA

1st- on Feb 11th & 12th my 2014 cla which was purchased at the mb of pembroke pines had been towed to the mb of pompano, fl dealership because of the eps lights, "inoperative" warning messages that were coming up as well as the stalling and delayed acceleration, which I took photos of. It was towed to pompano form my job, my car was kept at the dealership for 4 days (as opposed to the few hrs I was told that it would take to fix the computer issues). Not only was my car in the shop for 3 days, but a part that had been ordered, which means something obviously wasn"T functioning properly so it had to be replaced. 2nd - I picked up my vehicle on sat Feb 15th from the pompano, after getting onto the I95 and driving 2 mins, the same warning signs came back up. I exited driving 15mph and trying to keep the vehicle stable. Mr. Mike rodriguez was instructed to test drive the vehicle, however, when he did so the warning signals were gone. Why" because a service guy restarted the vehicle and drove it into the service area. Being that the signal was no longer visible, the GM suggested that if there was ever a signal sent to the vehicle it would show up in some sort of reading they were able to do on the vehicle. When they returned, both the GM and Mr. Rodriguez informed us that the vehicle showed them there was no signal that was sent to the vehicle all day. I litterally just saw it not 30 mins ago. We left & about 2 mins from my home in boca raton, the signal was back with vengeance! at this point I took pictures. I pulled into my drive way, but this time I left the vehicle running. 3rd -on March 2nd at around 2:45pm, after about a week of having my vehicle back, I was driving when the same warning signs and acceleration problems were back. I left it running with all the signals up and it had to be towed back. This is a summary of the incidents.this has to stop! not safe!

- Boca Raton, FL, USA

On Sunday, October 27, and Tuesday, October 29, 2013, my vehicle listed above had warning lights come on that stated, "pre safe, functions limited, inoperative." In addition to the words, the esp and ABS lights illuminated. I took the vehicle to penske mbz in West covina, ca, on Wednesday, October 30. They repaired the vehicle by doing a software update. On Saturday, November 2, 2013, the codes returned and I took the vehicle back to where I bought it, encino, ca, mbz. I was told they could not replicate the codes and they found no problem. This is unacceptable! the vehicle is still at encino mbz as they are trying to replicate the problem. When this malfunction occurs, the vehicle loses power and has very limited acceleration. It has occurred twice on city streets and twice on the freeway, both in eco and sport mode. On the city streets I am able to just pull to the curb. On the freeway, it becomes a possible life threatening emergency. There is only very gradual acceleration, and at 65mph, limited acceleration is very dangerous. These four occurrences have taken place in less than a 10 day period and no long term repair has yet been accomplished!

- San Dimas, CA, USA