Mercedes-Benz S500 4MATIC Questions

Unanswered Mercedes-Benz S500 4MATIC Questions

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I brought it to delray automall to fix and they said that they replaced the resistor blower motor. The same problem is still happening and now won't come on at all. Could you please advise me on how to tell if they ev...
At oil change, what type and viscosity should be used?
lights, music, horn and heat works but it wont start
cant shift out from parking. can not drive at all
Recently I reloaded my CD changer which is housed in the trunk and when I turned on the audio device, it did not recognize the CD Changer. What are my options to this dilemma?