Components

Components

The sunroof consists of the following components:

- Sunroof cassette
- SHD Control unit
- Sunroof switch
- Vehicle bus interface

Sunroof Cassette

The structure of the sunroof cassette is similar to that of the E38/E39.




The parts that can be replaced with the cassette still installed in the vehicle are:

- Glass panel
- Floating headliner
- Wind deflector
- SHD module
- Roof gutter

The cables of the sunroof cassette cannot be serviced individually, if they are defective, the entire cassette must be replaced. If the sliding/tilt lever is damaged the cassette must also be replaced.


NOTE: Be careful removing the rubber drain hoses from the cassette because they are bonded to the body and are not easily replaced.


SHD Control Unit




The sunroof module is located, as with other models, behind the rear view mirror in the tenter of the roof. It contains the following components:

- DC motor with attached gear reduction mechanism.
- 2 integrated Hall sensors for position and trap detection.
- Control unit

The DC motor is controlled with a PWM signal to provide a smooth-rundown feature similar to the window operation.

This module can only be replaced as a complete unit.

Sunroof Switch




The switch is installed in the panel behind the interior light, beside the emergency call button.

Possible directions for movement:

1. Open
2. Close
3. Lift




The operations available from the sunroof switch correspond to the previous E38.

The sunroof switch provides the SHD module with requests for sunroof operation as coded grounds over three wires. The ground supply for the switch is from the SHD control unit.

Vehicle Bus Interface

The communication with the vehicle electronics is via the K-CAN-S connection.




CAS

The convenience opening/closing commands and the terminal status are received from the CAS via the K-CAN S.

Instrument cluster

The instrument cluster serves as a display of Check Control (CC) messages for the SHD.

Control Display CD

Extended CC messages are displayed in the CD.

Dynamic Stability Control DSC

The DSC provides the speed signal over the bus system used for the panic mode and antitrapping protection.