This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.
So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.
On multiple occurrences the vehicle has started to misfire at random times and speeds ranging from 45-70 mph resulting in "limp mode" or a stalling condition. The check engine light comes on, but will not be on when the vehicle is restarted. The dealership on no occasion has been able to duplicate my concern although others have been in the car to witness. I feel very unsafe driving the vehicle as when it stalls on the highway, I lose steering and brakes as well.
This was not an accident, it is, in my opinion, a possible safety problem with the vehicle - turbo lag; throttle lag; transmission lag. I almost had two accidents due to the lag problems, and have attached a more detailed analysis for your review. Turbo lag: This is the time it takes for the car to go from its naturally aspirated power to the full power of the car at full boost/ peak boost is reached relatively low in the reverse range, but it is not instantaneous power like a naturally aspirated engine. Throttle lag: The drive by wire system has a bit of lag. Under certain conditions, I measured it at.2 of a second or so. Whatever the value, there is always lag there, and we are very sensitive to it. However, driving ins mode vs E mode does make somewhat of a difference. Nonetheless, the car always starts out in E mode when I get in and start the car. We didn't purchase the car to always drive in S mode. Transmission lag: This I notice significantly and it is, in my opinion, probably the most annoying to me. You'll notice this when stomping the pedal to the floor and then doing the wait... wait... wait.. downshift. Even if this engine was running only on its naturally aspirated four cylinders, the transmission should respond immediately to a sure footed stomp to the floor with the quickness, as does my four cylinder rav-4. however, the mb C-250 does not! in my opinion, you can reset the tcu all you want, the delay will remain.
- Indian Land, SC, USA
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- Camp Hill, PW, USA