I was involved in a discussion of the purpose of a MB part last week and related that I had seen something on a 91 MB that I had never seen before. Not only is the model 14 years old but it has been servcied in our shop for most of those years... I just noticed it/them.

I have done no research yet, so I don't know the answer. Lets see if anyone else does. I have two pictures. The only thing that links them is my not knowing what either do. I don't even know if they are part of the same system.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician