Sam, thanks. I will be in need of this information for future install on a R107 with vacuum tank only. On a 124 chassis (at least the 1987 models), its not necessary to get into the door. All (except alarm disarm) wiring is done right at the vacuum pump under the rear seat.

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Hanno
'79 6.9 Sold (after 27 years)
'83 280SL, 5 spd.
'94 E320 Sdn. 5 spd conversion
'02 E320 Sdn.(on loan to mom!)
'87 300E (5 spd. conversion) Sold
'05 E500 Wagon