The heck...my car stopped accelerating on the freeway
Thread Starter
Super Member
Joined: Jul 2010
Posts: 744
Likes: 28
From: Houston, TX
2014 E550 Coupe and 2010 E350 Sedan
The heck...my car stopped accelerating on the freeway
So I'm on the way into the office. I'm on the on-ramp, and need to hit the gas to accelerate. I punch it actually to get up to speed fast, and the car doesn't respond.
I think, weird...look at my dash, and I have a notification I think was about the owner's manual. Again, I think...weird. I push the accelerator in again, finally noticing, the car is just cruising, power still on, but no acceleration. I pull over, and find the engine is actually still on (as far as I can tell). I turn the car off, power it back on, and everything is fine.
What just happened??
I think, weird...look at my dash, and I have a notification I think was about the owner's manual. Again, I think...weird. I push the accelerator in again, finally noticing, the car is just cruising, power still on, but no acceleration. I pull over, and find the engine is actually still on (as far as I can tell). I turn the car off, power it back on, and everything is fine.
What just happened??
Senior Member
Joined: Nov 2010
Posts: 466
Likes: 1
E350
Not sure - but for safety reasons I would have the dealer check it out ASAP.
FWIW, I had a similar experience in my old 2010 E350 - except it wasn't fixed with an engine restart. I had it towed to the dealer and they had to replace the engine control unit (ECU). Took a week because they had to order the part from Germany.
FWIW, I had a similar experience in my old 2010 E350 - except it wasn't fixed with an engine restart. I had it towed to the dealer and they had to replace the engine control unit (ECU). Took a week because they had to order the part from Germany.
Thread Starter
Super Member
Joined: Jul 2010
Posts: 744
Likes: 28
From: Houston, TX
2014 E550 Coupe and 2010 E350 Sedan
Not sure - but for safety reasons I would have the dealer check it out ASAP.
FWIW, I had a similar experience in my old 2010 E350 - except it wasn't fixed with an engine restart. I had it towed to the dealer and they had to replace the engine control unit (ECU). Took a week because they had to order the part from Germany.
FWIW, I had a similar experience in my old 2010 E350 - except it wasn't fixed with an engine restart. I had it towed to the dealer and they had to replace the engine control unit (ECU). Took a week because they had to order the part from Germany.
Thanks for the response.
Super Member
Joined: Sep 2006
Posts: 761
Likes: 23
From: Oklahoma
W211 E320 & W212 E550
I've experienced the same thing. When I stomp on it, only when the cruise control is engaged though, it does exactly that and gives a dash warning. Keying off and on the car resets it but no malfunctions registered. Doesn't happen every time but has a few times. I just disengage the cruise if I plan on hammering on the accelerator.
