General

The central locking system can only be activated by the IR transmitter or for (USA) (J) activation of the CL system is possible via the mechanical key from the outside as well. Opening and closing of the vehicle using the mechanical key does not have an influence on the central locking system. When unlocking, global" or "selective" unlocking can be selected.
Global: all lockable locks unlock on the vehicle.
Selective: Only the driver's door and fuel filler flap unlock.

Activation of the Pneumatic System Equipment (PSE):
On models 129 and 140, the PSE control module is activated via the DAS radio frequency/infrared control moduleN54/4), via the signals SN1 and SN2.

On model 170, the control wire from the radio frequency DAS control module (N54/3), and from the interior switch CL (S6/1s2) is connected to the combination control module (N10-3). Via the combination control module, the required signals are sent via two CAN data lines to the PSE control module.

Specialized Functions of the Central Locking System:
- Emergency unlocking
Integrated within the PSE Control module is a crash sensor, which upon a vehicle de-acceleration rate of 6g from all angles will unlock the vehicle. The sensor is only active if the vehicle is unlocked from the outside.
- Automatic locking
If the automatic locking feature is activated, the vehicle will lock at vehicle speed of greater then 9 mph.
- Subsequent locking
In order to prevent an unintentional unlocking via the remote central locking system, the vehicle is automatically locked provided none of the vehicle doors are opened within 40 seconds, the key is not in the ignition lock or the interior switch (CL) activated (pressed).