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E90 General Vehicle Electrical
Center-Lock Button
The center-lock button is installed in the instrument panel
in the center of the outlet nozzle.
A new feature is that the center-lock button forms one
component together with the hazard warning switch, the
button for dynamic stability control and the stratification
potentiometer.
Driver's Door Lock Barrel
The lock barrel is connected mechanically via a linkage to the door lock. Hall sensors
for the lock barrel are integrated in the door lock.
The footwell module evaluates the signals from the Hall sensors for locking/unlocking
purposes.
Central Locking Drive Units
A central locking drive unit consists of an electric drive unit and the unlocking/locking
mechanism.
Central Locking Drive Units in the Doors
The central locking drive units in the doors are equipped with two motors to facilitate the
unlocking/locking and central arrest functions of the vehicle.
Central arrest means that the locking button in the doors is separated mechanically from
the central locking drive unit. As a result, the vehicle cannot be opened by pulling the
locking button. The Hall sensor for the door contact is additionally integrated in the cen-
tral locking drive unit.
Index Explanation
1
Mechanical Key
2
Spare Key
3
Remote Control
Index Explanation Index Explanation
1
Hazard Warning Flasher Button
3
Stratification Potentiometer
2
Dynamic Stability Control Button
4
Central Lock Button
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