General

Central Locking System (PSE/CL)

NOTE: 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):
The radio signal is sent to the antenna of the roof control panel control module (N70). From there the electronic ignition lock control module (N73) is activated via the CAN data line. The IR signal is sent from the left/right front door IR receiver (A26/1, A26/2) to the necessary front driver- side/passenger-side door control module (N69/1, N69/2).

From there the electronic ignition lock control module (N73) is activated via the CAN data lines. If the electronic ignition lock control module recognizes a valid radio or IR signal, the corresponding activation signals are transmitted to the PSE control module (A37) via the CAN data lines.

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 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 a 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) is not activated (pressed).

NOTE:
Function of the trunk release switch (S15/1)
(Model 202/210 sedan, Model 208):
The trunk release switch (S15/1) is located on the trunk lid lock. With the vehicle unlocked via the remote central locking, and the trunk lid lock button is pressed, a ground signal is sent from the trunk release switch (S15/1) to the PSE control module (A37). The PSE control module produces pressure which in turn activates the RTR pneumatic actuator and the trunk lid opens.

If the vehicle has been locked via the IR transmitter, the switch signal is also received by the PSE control module (A37), however the PSE control module recognizes the vehicle as being locked and as a result the PSE control module does not activate the RTR pneumatic element actuator.