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E90 General Vehicle Electrical
Special Comfort Access Functions
The Comfort Access System additionally features special functions that are determined
by the actions of the vehicle user such as:
ID Transmitters Remain in Vehicle
If an ID transmitter remains in the vehicle interior, by checking via the interior antennas,
the car access system 2 recognizes whether there is a valid identification transmitter in
the vehicle interior.
If a valid identification transmitter is detected in the vehicle interior and the vehicle is
locked by means of another valid identification transmitter, the identification transmitter
located in the vehicle interior is set to "invalid".
For the Comfort Access System, this identification transmitter is considered as no longer
belonging to the vehicle until the vehicle is unlocked again.
ID Transmitter Remains in Trunk
If an ID transmitter is in luggage compartment, upon closing the trunk lid, it is immediately
opened (automatically).
If there is an identification transmitter in the luggage compartment of the locked vehicle
with the trunk lid open. An audible and visual signal draws the customer's attention to the
fact that the identification transmitter has been left in the luggage compartment.
On request from the CAS2, the Comfort Access control module starts the check via the
interior antennas. The valid identification transmitter in the luggage compartment is rec-
ognized via the luggage compartment antenna. Consequently, the CAS2 does not issue
the enable signal to lock the trunk lid.
The trunk lid cannot be closed before the ID transmitter has been removed and is located
outside the luggage compartment.
Note: An ID transmitter can be locked in the truck if a second valid ID transmit-
ter is identified as being on the exterior of the vehicle within the radius of
the bumper antenna or if the valet function is active.
Engine Start Disable
The engine cannot be started if the identification transmitter is located in the luggage
compartment of the unlocked vehicle.
Note: The CAS2 issues the enable signal for starting the engine only when a
valid identification transmitter has been detected in the vehicle interior.
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