No shift is a communication problem.
If the prndl is not lighting up,
replace the Electronic Shift Module
(ESM), which is part of the shifter assembly.

They get drinks spilt on them...you could remove the whole shifter assembly and soak/rinse the ecm in distilled water and contact cleaner....this has resurrected a couple of shifter ecm problems this way in my shop.... it depends how much your time is worth.

Would suggest you contact a Mercedes specialist used parts company maybe..

http://www.usedpartslive.com/live/1/year/MERCEDES-BENZ/






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