Car/Key Memory (page 2 of 2)

BODY CONTROL UNIT

DESCRIPTION AND OPERATION

86-3-3

Automatic movement of the seat can be stopped by pressing the remote control 'lock' button or any of the seat 
adjustment or memory switches. Automatic movement can be restarted by pressing the remote control 'lock' button 
again. Pressing the 'unlock' buttons (for selective central locking) and 'unlocking the boot' does not stop automatic 
seat movement.

Storage of personalised settings is automatically updated for each setting change provided a valid remote control key 
has been detected (interruption of the automatic recall movement of the driver seat, door mirrors and steering column 
is not interpreted as a setting change). The last setting for the recognized driver is automatically stored in the key 
memory area of the corresponding control module. If no valid remote control key has been detected, setting changes 
are stored in a recall memory for retrieval when an invalid key is detected.

The following Table contains the car and key memory functions that can be changed (depending on market) using 
TestBook/T4.

 Control Unit

Function

Parameter

Memory Type

ATC ECU

Recirculation memory

Active/ Inactive

Car

Instrument pack

Language of messages

Canadian English; English; 
French; German; Gulf States; 
Italian; Japanese; Spanish; US 
English

Car

Instrument pack

Time display (time of day, arrival, 
timer) 

12 or 24 hours clock

Car

Instrument pack

Consumption units

Litres/100 km
mpg (UK)
mpg (USA); km/litre

Car

Instrument pack

Travel units (range, distance) 

km (km/h)
miles (mph) 

Car

Instrument pack

Temperature unit

Active/ Inactive

Car

Instrument pack

Ignition key warning (door open and 
key in ignition starter switch)

Active/ Inactive

Car

Light check module

Daytime running lights Europe

Active/ Inactive

Car

Light check module

Daytime running lights NAS

Active/ Inactive

Car

Light check module

Headlamp courtesy delay time 
duration (ignition key removed and 
headlight flasher activated)

0 to 240 seconds at fixed 
intervals

Car

PDC

PDC sounder volume (rear sounder) Levels 1 (quiet) to 6 (loud) 

Car

Radio

Tone, audio source and last station 
save

Active/ Inactive

Car

Driver seat module

Automatic assumption of last driver 
specific positions for seat, steering 
column and exterior mirrors

Inactive
After unlocking door
After unlocking and opening door 

Car

BCU

Alarm arming/ disarming

Lock and remote control
Only with remote control 

Car

BCU

Alarm armed acknowledgement, 
acoustic

Active/ Inactive

Car

BCU

Alarm disarmed acknowledgement, 
acoustic

Active/ Inactive

Car

BCU

Alarm armed acknowledgement, 
visual

Active/ Inactive

Car

BCU

Alarm disarmed acknowledgement, 
visual

Active/ Inactive

Car

BCU

Panic mode

Active/ Inactive

Car

BCU

Visual acknowledgement of locking 
without arming alarm, by lock and 
remote control 

Active/ Inactive

Car

BCU

Interior lamps on with multiple 
actuation central locking system

Active/ Inactive

Car

BCU

Soft On/Off

Active/ Inactive

Car