My‘92 300TE has the feature to close the windows and sunroof while locking with the key (and you can open them on a hot day by cleverly using the safety reverse feature -- a very nice thing, indeed). Also, it has auto-down windows in the front. I would love these features in my ‘86 300E. Is this something simple like a switch or relay swap, or is it more involved? Many thanks! Ciao

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David
1986 300E Anthracite + ECodes + MB Mileage Award