Jeffsho28

Car has 2500 miles on it and every time I floor it in 3rd gear boost goes to about 30 percent and hp stays around 280 it is at dealer for third time there saying may be an exhaust flap stuck after googling I’m seeing other people had similar issues on e63 and c63 anyone have any luck with this fix? Or do u have any ideas what else it could be

NovaOne

Only in 3rd gear?

Jeffsho28

usually starts in 3rd goes into 4th as well

AMGBEASTMODE

Renntech EVM module overrides the factory and sounds great!

Jeffsho28

Will that prevent this from happening again

aalsa3i

i have that same problem. Funny thing is, it might have to do with the exhaust flaps because i know for a FACT that one side of my exhaust flaps doesn't work properly. it sometimes opens half way . i only started having the turbo lag once i installed the exhaust and its currently in the company right now so il update you what they tell me.