R/P Lock, Function (Without Touch Shift)

Fig 1: R/P Lock, Function

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Operation 

The reverse and parking lock solenoid (Y66/1) is actuated via the ETC control module (N15/3) and moves the lever (69a) in the direction of the cam (69b) so that the shift shaft (66) is blocked. See Fig 1. When de-energized, the support lever (69c) holds the lever (69a) in position to prevent it from engaging by itself when exposed to severe shocks.