Central Locking System, Basic Function - GF80.20-P-9900A
Model All (4xWD)
Model All (CAR)
Overview
This document contains information on:
- General
- Function
- Unlocking/locking the vehicle
- Play protection
- Additional door lock
- Acoustic and visual verification signals
- Locking requirements with a running engine
General
The central locking system (CL) controls the vehicle unlocking and locking. Actuators in the vehicle doors, trunk lid or tailgate unlock or lock the respective locks.
"Global" or "Selective" can be set as the types of unlocking for unlocking the vehicle.
The entire vehicle is unlocked in the case of global unlocking. Opening the trunk lid or liftgate and of the fuel filler flap and socket flap is permitted.
In the case of selective unlocking, the driver's door is unlocked and the fuel filler flap and socket flap can be opened. If the vehicle is subsequently unlocked again, all additional vehicle doors are unlocked and the trunk lid or tailgate can be opened.
For vehicles with a separate trunk locking, the opening requests for the trunk lid can be ignored by actuating the separate trunk locking switch.
Function
Unlocking/locking the vehicle
The central locking can be triggered by various control elements or functions.
Triggering of the central locking system
| Control element/function | Release |
|---|---|
| Transmitter key | Press unlock/lock button on transmitter key. The transmitter key must be authorized. |
| KEYLESS-GO door handle (vehicles with KEYLESS-GO) | Grab hold of and/or pulling a door handle. The transmitter key must be authorized. |
| Mobile phone or digital key sticker (vehicles with vehicle access and drive authorization via mobile phone) | Hold mobile phone or digital key sticker to driver handle. The mobile phone or digital key sticker must be authorized. |
| Front inside door handle switch | Actuate unlock or lock switch. When locking via the close switch, the fuel filler flap and socket flap always remain unlocked. |
| Automatic locking | Exceedance of a defined vehicle speed or waiting time (relocking). The function can be manually activated or deactivated. |
| Emergency opening after an accident | Triggered by the Supplemental Restraint System (SRS). To facilitate access to the vehicle occupants, auxiliary material, and QR code on the fuel filler flap and socket flap. |
| CL remote door unlock or CL remote door lock (vehicles with HERMES or RAMSES) | Triggered by Service Center. For the case that, for example, the transmitter key has been locked into the vehicle or forgotten. |
| Trunk lid control button (vehicles with remote trunk closing and KEYLESS-GO) | By pressing the trunk lid control button, the trunk lid is closed and the vehicle is then locked. The transmitter key must be authorized and its position determined. |
| Liftgate control button (vehicles with EASY-PACK liftgate and KEYLESS-GO) | By pressing the liftgate control button, the liftgate is closed and the vehicle is then locked. The transmitter key must be authorized and its position determined. |
| Trunk lid/tailgate external operation switch (vehicles with KEYLESS-GO) | By actuating the trunk lid/tailgate external operation switch, the trunk lid or tailgate is unlocked. The transmitter key must be authorized and its position determined. |
| HANDS-FREE ACCESS (vehicles with HANDSFREE ACCESS) | The trunk lid or tailgate is unlocked via foot movements ("kick movement") under the rear bumper. The trunk lid then opens via spring force. In vehicles with EASY-PACK tailgate, the tailgate is automatically opened. In vehicles with remote trunk closing or EASY-PACK liftgate, the open trunk lid or the open liftgate is automatically closed and then locked via a foot movement under the rear bumper. The transmitter key must be authorized and its position determined. |
The CL evaluates the respective incoming request and transmits it to the involved control units. These in turn unlock and lock the door locks via the respective CL motor.
Opening the trunk lid or liftgate and fuel filler flap and socket flap are approved or blocked.
The driver's door remains unlocked if the CL is locked with the transmitter key even though the driver's door is not fully closed. The entire vehicle remains unlocked in vehicles with KEYLESS-GO.
When the door is locked, the connection of the inside door handle lever to the door lock is mechanically decoupled. It is no longer possible to open the door from the inside.
It is thus not possible to break into the vehicle by smashing a window and opening the door from the inside.
Acoustic and visual verification signals
All CL actions are indicated to the user via visual and acoustic verification signals.
KEYLESS-GO represents a variant of the operation of the CL. KEYLESS-GO enables the unlocking and locking of the vehicle and the starting and switching off of the engine without active use of the transmitter key. It is sufficient just to carry the transmitter key.
The KEYLESS-GO function can in vehicle keys before modification year 2022/1 be deactivated by double clicking the "Lock button". From modification year 2022/1, the vehicle keys with the KEYLESS-GO function will be changed over to two-hand operation. The KEYLESS-GO function is then deactivated by holding the "Lock button" and double clicking at the same time on the "Unlock button".
The socket flap, behind which the socket for charging the high-voltage battery is located, is also unlocked/locked via the CL in hybrid or electric vehicles.
For vehicles with anti-theft alarm system (ATA): If the driver's door of a locked vehicle is opened with opened with the emergency, the ATA triggers an alarm.
Play protection
No additional actions are executed after 40 CL actions are performed in close succession: The count value is reduced by one every 7 s.
The CL can only be actuated again once the count value has dropped below 40.
Additional door lock
Vehicles with increased anti-theft protection.
The acoustic verification signal can be activated/deactivated via the multimedia system. It is output via the horns. The horns are actuated once during locking.
No acoustic verification signal is output if a door, trunk lid or tailgate or fuel filler flap and socket flap are still open during locking.
The visual verification signal is output via the hazard warning lights. One flashing cycle is output when unlocking. Three flashing cycles are output when locking.
No visual locking verification signal is output if a door, trunk lid or tailgate or fuel filler flap and socket flap are still open during locking.
Locking requirements with a running engine
For vehicles before model year 2023, no external locking requests are evaluated with the engine running.
In vehicles as of model year 2023, external locking requests will also be evaluated by the KEYLESS-GO control unit and forwarded to the electronic ignition lock when the engine is running.
| Function schematics | |||
| Function schematic for central locking system activation | Model 118, 167, 177, 243, 247, 293 | PE80.20-P-2500-97A | |
| Model 206, 214, 223, 254, 294, 295, 296, 297 | PE80.20-P-2500-97B | ||
| Model 213, 238, 257, 290 as of model year 2021 | PE80.20-P-2500-97C | ||
| Model 192, 232 | PE80.20-P-2500-97E | ||
| Model 464 | PE80.20-P-2500-97F | ||
| Function schematic for unlocking/locking vehicle through central locking system | Model 118, 177, 243, 247 | PE80.20-P-2501-97A | |
| Model 167 except code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) | PE80.20-P-2501-97B | ||
| Model 206, 214, 223, 254 | PE80.20-P-2501-97C | ||
| Model 167 with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) Model 293 | PE80.20-P-2501-97D | ||
| Model 213, 238, 257, 290 as of model year 2021 Model 464 |
PE80.20-P-2501-97E PE80.20-P-2501-97F |
||
| Model 192, 232 | PE80.20-P-2501-97H | ||
| Model 294, 295, 296, 297 | PE80.20-P-2501-97I | ||
| Further basic functions | |||
| Authorization of transmitter key/mobile phone, basic function | GF80.20-P-1004A | ||
| Position determination of transmitter key, basic function | GF80.20-P-1009A | ||
| Actuate turn signal light, basic function | GF82.10-P-1023A | ||
| Front door control unit, basic function | Model all (CAR) | GF72.29-P-9891A | |
| Rear door control unit, basic function | Model all (CAR) | GF72.29-P-9892A | |
| Electronic ignition lock control unit, basic function | GF80.57-P-9890A | ||
| KEYLESS-GO control unit, basic function | Model 293 | GF80.61-P-9891A | |
| Trunk lid/liftgate lock, basic function | GF80.20-P-2012A | ||
| Central locking system inside door handle switch, basic function | GF80.20-P-2014A | ||
| Fuel filler cap central locking system actuator, basic function | Model all (CAR) | GF80.20-P-2015A | |
| Door lock, basic function | Model all (CAR) | GF80.20-P-2017A | |
| Transmitter key, basic function | GF80.35-P-2001A | ||
| KEYLESS-GO door handle, basic function | Model all (CAR) with code 889 (KEYLESS-GO) | GF80.61-P-2003A | |
| Rear switch module, basic function | Model all (CAR) with code 871 (Sensor system for trunk lid opening/closing) | GF80.61-P-9890A |