Shift-lock, function - GF27.10-P-2008NT

TRANSMISSION 722.9 in MODEL 171.4, 203 up to Model Year 8 

TRANSMISSION 722.9 in MODEL 209, 211, 219 

The term shift lock combines the functions which, in addition to the parking brake, offer an additional safeguard for the vehicle to prevent it moving off unintentionally. Included in this are the functions of locking the selector lever position "P" and locking the ignition switch as well as the park pawl in the transmission. The Shift-Lock only permits shifting out of selector lever position "P", if the transmitter key (A8/1) has been turned into position "circuit 15 ON" and the brake pedal is depressed.

In order to ensure that after parking the vehicle the selector lever is shifted into selector lever position "P", it is only possible to turn the transmitter key (A8/1) towards "0" in this position and to remove it from the electronic ignition switch control unit (N73). The vehicle is secured mechanically by blocking the parking lock gear. In the event of mechanical, electrical or electronic faults selector lever position "P" can be unlocked manually (function of Shift-Lock-Override).