Central locking (CL [ZV]), function - GF80.20-P-0005GA

MODEL 463.306 /336 /346 as of model year 2011 /YoM 10

MODEL 463.202 /222 /236 /237 as of model year 2009 /YoM 08

MODEL 463.244 /245 /247 /248 /249 /250 /254 /309 /332 /333 up to 31.8.08

MODEL 463.270 /271 /303 /340 /341 as of model year 2007

Function for central locking shown on closing CL

Fig 1: Central Locking Function Diagram

Courtesy of MERCEDES-BENZ USA

The central locking system controls the function "Remote controlled opening and closing" of the vehicle. These convenience features are constituents of the drive authorization system (DAS [FBS] 3).

The EIS [EZS] control unit (N73) has a central function here.

The following functions are performed:

Managing right/left-hand steering functions and corresponding assignment of front door control units for driver and passenger door
Managing outer safety statuses and corresponding transmission of closing messages for individual doors, the rear-end door and fuel filler flap according to global/selective preselection.
Enable and disable of unlocking functions for CL inside switch
Control of automatic door locking via v-signal, (greater than v = 15 km/h)
Administers the automatic locking function.
Control of relocking when a door/trunk lid is not opened within 40 s after CL is opened.
Control of relocking with door open/closed and exceeding v-threshold again.
Transmits messages for external securing and external enabling.
Switching off remote control functions, when key is inserted
Definition of memory range for determination of selective opening via diagnosis
Re-enables locking functions after emergency opening (crash).
Monitors the actuation frequency of the CL (play protection).

The central locking can be operated in various manners:

By remote control with transmitter key.
Operation with the interior switch.
By opening the driver door from the inside

Central locking (CL [ZV]), location of components

GF80.20-P-0005-01GA