gf8020p9900a

Central locking system, basic function

Type gf · topic 80.20 · version 0104 · 2020-06-30

Applies to: Model all (CAR)

Where it sits

Function group 3 Body › 80 Central locking system, convenience operation, drive authorization systems › 80.20 Central locking system, interior central locking — Series 900 (models 9**) · Series 902 (models 9**) · Series 904 (models 918, 919, 924, 925, 938, 943, 957) · Series 906 (models 917, 918, 924, 953)

EinPAS 29 Drive authorization/security system › 29.16 Locking/unlocking › 29.16.1 Basic information — Series 900 (models 9**) · Series 902 (models 9**) · Series 904 (models 918, 919, 924, 925, 938, 943, 957) · Series 906 (models 917, 918, 924, 953)

Also applies to engines/gearboxes: 139 ***, 254 ***, 256 ***, 272 ***, 276 ***, 282 ***, 457 9**, 541 9**, 542 9**, 608 ***, 700 4**, 700 420, 700 421, 700 422, 700 423, 715 3**, 715 5**, 722 6**, 722 9**, 724 ***, 724 0**, 724 033, 724 044, 724 045, 724 1**, 724 103, 724 114, 724 115, 724 120, 725 ***, 725 0**, 725 035, 725 037, 725 038, 725 085, 725 1**, 739 390, 739 391, 739 395, 739 396, 739 397, 739 398, 739 399, 740 698, 743 3**, 743 4**, 743 498, 746 971, 924 9**, 924 910, 925 9**, 926 9**

GF80.20-P-9900A

Central locking system, basic function

15.06.2020

Model

all (CAR)

KEYLESS-GO enables the unlocking/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.
KEYLESS-GO represents a variant of the operation of the central locking system (CL).

Overview

This document contains the following information:

General

Unlocking/locking the vehicle

Acoustic and visual verification signals

General

The central locking system controls the unlocking/locking of the vehicle. 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.

Unlocking/locking the vehicle

The central locking can be triggered by various control elements or functions.

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)

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.

Tailgate control button (vehicles with EASY-PACK tailgate and KEYLESS-GO)

By pressing the tailgate control button, the tailgate 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 HANDS-FREE ACCESS)

The trunk lid or tailgate is unlocked via kick movements 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/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.

Play protection
No additional actions are executed after 40 CL actions performed in quick 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.

Hybrid vehicle or electric vehicle

The socket flap, behind which is located the socket for charging the high-voltage battery, is locked/unlocked via the CL.

Vehicles with anti-theft alarm system (ATA)

The ATA triggers an alarm if the driver's door of a locked vehicle is opened with the emergency key.

Additional door lock (vehicles with increased anti-theft protection)

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.

Acoustic feedback

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.

Visual feedback signal

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.

Function schematics

Function schematic for central locking system activation

Model 213, 238, 257, 290 as of model year 2021

PE80.20-P-2500-97C

Model 118, 177, 247Model 167Model 293

PE80.20-P-2500-97A

Function schematic for unlocking/locking vehicle through central locking system

Model 118, 177, 247

PE80.20-P-2501-97A

Model 213, 238, 257, 290 as of model year 2021

PE80.20-P-2501-97E

Model 167 except code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))

PE80.20-P-2501-97B

Model 167 with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))Model 293

PE80.20-P-2501-97D

Subsystems

Authorization of transmitter key/mobile phone, basic function

GF80.20-P-1004A

Position determination of transmitter key, basic function

GF80.20-P-1009A

Further basic functions

Actuate turn signal light, basic function

GF82.10-P-1023A

Control units

Front door control unit, basic function

GF72.29-P-9891A

Rear door control unit, basic function

GF72.29-P-9892A

Electronic ignition lock control unit, basic function

GF80.57-P-9890A

KEYLESS-GO control unit, basic function

Model all (CAR)

GF80.61-P-9891A

Components

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

GF80.20-P-2015A

Door lock, basic function

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

Referenced documents