I never had to replace one.

Are they pricey?

Second, are they a pain in the butt?

Very common problem..MB number 129-545-00-95 lists for $76.

__________________
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

Is module box is the same as e-box? I think I came accross to a site that shows you how to clean this fan..

http://www.keysolutions.com/M-Class.nsf/aac7d56ca8fd884b852563be00610639/75f1f0428ed1baea85256c9b0052c2d3?OpenDocument

Maybe this could work elimimating the noise..

Module box it is.

Thanks for the info.

As many of those ML's I worked on, I never had the pleasure of replacing a module motor, and if I did, I sure don't remember.