33
E88 Complete Vehicle
Controls for Operation
The center console switch cluster has 2 buttons for operating the convertible top (Open
convertible top and Close convertible top). The center console switch cluster (SZM) is
connected to the heating/air conditioning controls module.
Above the two buttons there are a red and a green function LEDs. These LEDs are con-
trolled by the convertible top module (CVM) via the K-CAN. The green LED lights up
while the convertible top is moving. The red LED starts to flash if the convertible top or
the top storage compartment lid is not located securely in their end position when the
button is released.
The flashing red LED does not denote a fault. The flashing LED is intended to draw
attention to the fact that the vehicle should not be driven in this state.
When the convertible top is opened by pressing the button, and there is a disabling con-
dition (like, the trunk partition not lowered) the red LED lights up to signal the fault.
The two control buttons are each equipped with 2 double contacts (normally open con-
tact against ground). A wire leads directly to the CVM and reports a general operation
request. The second wire reports the direction to the control unit for the heating/air condi-
tioning system (IHKA). The signal is then transmitted to the CVM via the K-CAN.
The execution of an operation request takes place after a time delay. If the button is
released during the operation, the convertible top or side window movement stops imme-
diately.
Location of the control buttons for the convertible top
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