Gear Shift module Virginize and reprogram
This problem is discussed ad nauseam, and you may need to buy theft blocking used components,
First look at the transmission module for leaks and connector problems.
Last edited by kraut56; Jul 29, 2024 at 01:09 PM.


My second check would be to find the TCM (Transmission Control Module) buried in the right front SAM (Signal acquisition Module) (remembering that left/right is always from the viewpoint of the seated operator) pull it out, disconnect it, open the plastic case, and thoroughly clean the board with brake/parts cleaner, and reinstall.
My third check would be to remove and replace every electrical connector on the shifter several times (one is hard to see).
Only then would I get into sending one of the few shops that can actually program the theft-relevant shifter a lot of money, hoping that it works.
You gave the model and year, but you will get better and quicker help if you tell us everything, such the market for which the car was built, whether 4Matic or not, etc.
Last edited by wallyp; Jul 29, 2024 at 11:03 AM.


