Anonics

Hey guys, just picked up an 04 E55 AMG, and while I was opening it up on the highway, it seems when the car hits around 140 it bogs severely and the rpms are stuck, and the car won’t accelerate anymore, any ideas what I could be, I’ll upload a video of it

bbirdwell

My first look? I would monitor intake air temperatures. Quite possible the coolant pump for the heat exchanger is bad.

Anonics

I mean my oil temps look normal, but you think the coolant pump for the heat exchanger, would cause it just to not accelerate anymore, I thought it was something transmission related, like the conductor plate

bbirdwell

When intake air temperatures rise too high the motor electronics disengage the supercharger. When that happens it feels like the car falls on its face.
If you have a star diagnostic system it is an easy check under the motor electronics module where you can verify operation of the coolant pump for the heat exchanger.

forestek

seems we have the same issues, I have just posted last week about this... Feedback seems the be the same from all with regards to air intake temp.

Anonics

Huh never knew that, that would make sense it seems like, I'm just going to replace the unit as its probably never been changed before, thank you I appreciate the help!