I am being told that I need a new engine control module by MB Dealership in 91 300TE wagon. I have not found a part by this name on my W124 CD. Is anyone familliar with this term? could it be a reference to an EHA or engine systems control unit (N16)? I am at a loss as to what they are calling an $1,115 part with dealer cost of $675 and want to try to evaluate their diagnosis.

Thanks,

Bob