boost problem

[steveyboy]

My best advice is to stop throwing parts at it and get it diagnosed by a specialist or dealer. Do a smoke test first. This is where teh entire intake system is filled with smoke to identify leaks. A very small one can cause your issue.

They suffer from leaks around the inlet manifolds as the bolts snap.

i am trying to find a garage that can do a smoke pressure test no luck so far.

 

[steveyboy]

would be a great video if it was in english hard to follow.

how did you fix your problem

 

[steveyboy]

When I changed my exhaust to a Catback Titanium exhaust system on my E53 Coupe mine would also go into limp mode (no boost) if I floored it. Quick restart and the boost would come back again same as yours except the error code I got was a P029909
View attachment 119524

how did you fix your problem

 

[BlackC55]

Most garages have them. There must be a MB specialist near to where you live?