R/P lock, function - GF27.60-P-5103-04G

Transmission 722.6 without touch shift 

Fig 1: Identifying 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. 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.