B class rearview mirror "sensor"?
https://en.wikipedia.org/wiki/Mercedes-Benz_B-Class
scroll down and post in the appropriate B class category for your model/year
it is unlikely that owners of E320 class models will be familiar enough with
your car to be of assistance. hope that makes sense
of models, unless it is widespread, of course. so the "Technical Service
Bulletins" are compiled for each model/version identifying problem areas which
have been reported by the dealer as well as recalls (MB-speak 'service campaigns').
this is why it is important for your inquiry to be within the applicable forum.
so just scan the several B-class forums under which your model should be
identified (following the bold font category heading)
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