Check position of drive shafts. - AR77.20-P-1400-01SX

Shown with tilting/sliding roof cover removed 

1. Check position of hole (1) in upper gate, in relation to drive wedge (2) in lower gate.

   Distance of hole (1) to drive wedge (2) max. 3 mm, deviation from left to right side of vehicle, approx. 2 mm.

   Fig 1: Identifying Upper Gate Hole And Drive Wedge

   Courtesy of MERCEDES-BENZ USA