Open/Close Sliding Sunroof, Basic Function - GF77.20-P-9901A
Model all (CAR)
with code 413 (Automatic panoramic sliding sunroof)
Model all (CAR)
with code 414 (Sliding sunroof)
Overview
This document contains the following information:
- General
- Function requirements
- Open/close sliding roof
- Memory function
- Speed-dependent tilt adjustment (vehicles with a panoramic sliding sunroof)
The following text describes the sliding roof and panoramic sliding sunroof together. Deviations between the systems will be pointed out separately.
General
The sliding sunroof provides the possibility to ventilate the vehicle interior in a pleasant way and without causing a draft.
The glass design creates a bright and friendly atmosphere in the vehicle interior at the same time.
The sliding sunroof is driven by an electric motor and can be opened and closed in the slide position or lifted and lowered in the tilt position.
Vehicles with sliding roof
The sliding sunroof is lowered in the slide position and moved between the roof lining and the roof paneling.
An element of the roof lining that can be moved by hand provides a visual cover and sun protection.
Vehicles with panoramic sliding sunroof
The panoramic sliding sunroof is lifted in the slide position and moved over the rear glass element.
An electrically driven roller sunblind provides a visual cover and sun protection.
Function requirements
- Panoramic sliding sunroof roller sunblind fully opened (vehicles with panoramic sliding sunroof)
- Circuit 15R ON or control unit power-down active (manual operation)
Control unit power-down
After circuit 15R is OFF, the sliding sunroof can be operated via the roof system switch for another 5 min.
The sliding sunroof must be normalized for all automatic functions. The normalization ensures that the system can accurately determine the position of the sliding sunroof.
The position of the sliding roof cannot be determined in the denormalized condition. The function is then limited to incremental manual opening and closing.
Open/close sliding roof
The sliding sunroof can be opened, closed or moved to the tilt position and lowered again via different controls or functions both manually and automatically in a continuous manner.
| Control element/function | Action | Additional information |
|---|---|---|
| Roof system switch (actuated up to pressure point and held) | Actuation for the duration of operation (max. 20 s) | - |
| Roof system switch (actuated beyond the pressure point and released) | Actuation until the end or memory position is reached | - |
| Web-based via browser (e.g. tablet/PC/smartphone) (Vehicles with Remote Online) |
Actuation as per the application | The status of the sliding sunroof can be called up at any time. |
| On the vehicle side, this telematics service is implemented via a mobile radio connection to the Service Center. | ||
| Convenience feature | Joint actuation with the side windows | - |
| Rain closing | Actuation of the open sliding sunroof to prevent the ingress of rain | - |
| Speed-dependent tilt adjustment (Vehicles with panoramic sliding sunroof) | Actuation of the open sliding sunroof to reduce wind noises in the vehicle interior | - |
| PRE-SAFE® (Vehicles with PRE-SAFE® system) |
Actuation of open sliding sunroof in potentially hazardous situations for protection of vehicle occupants | - |
If the roof system switch is actuated for more than 60 s, the actuation is aborted. The continuous request is assessed as a defect of the roof system switch. A new actuation (triggered via the roof system switch) can only be performed again after detecting that the roof system switch is in the rest position.
All automatic functions can be canceled by submitting a new or different request.
The normalized sliding sunroof has an automatic reversing function. This function provides protection against injury or damage caused by pinching. As soon as pinching is detected, the sliding sunroof is either only paused (during opening) or paused and then opened again (during closing).
In denormalized status, the blockage detection solely protects the component parts of the sliding sunroof against overload.
Memory function
After a manual setting is completed, the system saves the position of the sliding sunroof. When the sliding sunroof is opened automatically, it moves into the position that was saved most recently. The saved position is overwritten by every manual adjustment.
Speed-dependent tilt adjustment (vehicles with a panoramic sliding sunroof)
If the panoramic sliding sunroof is fully opened in the tilt position, it automatically lowers at higher speeds. Depending on the driven speed, the panoramic sliding sunroof is lowered in two stages. The wind noises in the vehicle interior are thus reduced. When a defined speed threshold is undershot, the panoramic sliding sunroof automatically raises again into the tilt position.
If the sliding sunroof is opened in slide position, a wind deflector positions itself automatically at a specified angle. Wind noises are reduced as a result and the draft in the vehicle interior is changed.
| Function schematics | |||
| Function schematic, open/close sliding roof | Model 167, 293 with code 414 (Sliding sunroof) | PE77.20-P-2500-97A | |
| Function schematic, open/close panoramic sliding sunroof | Model 118, 177, 247 with code 413 (Automatic panoramic sliding sunroof) | PE77.21-P-2500-97A | |
| Model 167 with code 413 (Automatic panoramic sliding sunroof) | PE77.21-P-2500-97B | ||
| Subsystems | |||
| Rain closing function, basic function | Model all (CAR) with code 413 (Automatic panoramic sliding sunroof) except code 494 (US version) Model all (CAR) with code 414 (Sliding sunroof) except code 494 (US version) |
GF77.20-P-1002A | |
| Open/close roof roller sunblind, basic function | Model all (CAR) with code 413 (Automatic panoramic sliding sunroof) |
GF77.20-P-9902A | |
| Normalize electrically driven component parts, basic function | GF82.00-P-1000A | ||
| Blockage detection, basic function | GF82.00-P-1001A | ||
| Automatic reversing, basic function | GF82.00-P-1002A | ||
| Control units | |||
| Sliding sunroof control module, basic function | Model all (CAR) with code 414 (Sliding sunroof) |
GF77.20-P-9891A | |
| Panoramic sliding sunroof control unit, basic function | Model all (CAR) with code 413 (Automatic panoramic sliding sunroof) |
GF77.21-P-9891A | |
| Components | |||
| Panoramic sliding sunroof drive unit, basic function | Model all (CAR) with code 413 (Automatic panoramic sliding sunroof) |
GF77.21-P-2002A |