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I removed this module from a 1986 420SEL, but I don't know its function. The Bosch part# is 0 285 001 003. The Mercedes part# is 000 820 02 97. I searched the net and received conflicting results. Various sites identified the part number as: cruise control module, temperature control unit, seat belt relay, airbag module or voltage transformer. I'm guessing that it is a temperature control unit/module, but that is just a guess. Can anyone out there make me smarter?

Also, is there any way of interpreting a Mercedes or Bosch part number to determine the function of a part?

Thanks very much!
Buzz
 

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