Can anyone tell me why my 2005 E55 makes a 10 second howling noise at start-up? The dealer told me it is related to the vacuum brake booster and nothing can be done about it. Any suggestions? Thanks!!

Have they offered to start a similar car to allow you to listen to that noise?

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

M.B. Doc no they haven't. I live in Il. and will contact some other dealers to see what they say. Thanks for the suggestion as there are no other E55"s in my area. This is annoying an annoying problem.

May not be many E55's, but a S55, Cl55, SL55, CLK55, ML55, G55 all should have the SAME sound on cold engine start-up. A good dealer should be willing to help!

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

M.B. Doc-Thank you and I have the dealer following your suggestions. Thanks again for your help!!