The provided document outlines the detailed procedure for removing and installing a panoramic glass sunroof, including preliminary work, main work, and post-installation processes. This comprehensive guide covers various components and their interactions, offering insights into the device's function, technical specifications, usage, and maintenance.
Function Description:
The panoramic glass sunroof is a multi-component system designed to provide an open-air experience and enhance the vehicle's interior ambiance. It consists of a front and rear glass panel, sun visors, an interior mirror, microphones, a roof function center (FZD), A, B, C, and D-pillar trim panels, an interior roof light, and coat hooks. The system allows for the opening and closing of the glass panels, often with a roller sunblind for sun protection. The roof function center (FZD) serves as the central control unit for the sunroof, managing its operation and interacting with other vehicle systems. The sun visors and microphones are integrated into the headlining, providing convenience and communication functionalities. The trim panels ensure a finished interior appearance and protect underlying components, including the head airbag. The entire system is designed for precise adjustment to ensure proper sealing, prevent groaning noises, and maintain aesthetic alignment with the vehicle's roof outer skin.
Important Technical Specifications:
The document provides specific technical specifications related to tightening torques and gap dimensions, which are crucial for proper installation and functionality.
- Panorama glass roof frame on body: Hexagon screws require a tightening torque of 5.4 Nm.
- D-pillar trim panel to body: Torx socket M5x42 screws require a tightening torque of 2 Nm.
- End support to mounting: 4.2x13 self-tapping screws require a tightening torque of 1.9 Nm.
- Panorama glass roof lid to mechanics: M5 screws require a tightening torque of 4.5 Nm.
Gap Dimensions (Roof Outer Skin to Glass Slide/Tilt Roof Panel):
- Front: 0.6 ± 0.8 mm (or 0.6 ± 0.75 mm in some instances). This dimension refers to the height difference between the roof outer skin and the front glass slide/tilt roof panel.
- Rear: 0.7 ± 0.75 mm (or 0.6 ± 0.8 mm in some instances). This dimension refers to the height difference between the roof outer skin and the rear glass slide/tilt roof panel.
Tap Dimension (Glass Slide/Tilt Roof Panel Front to Rear):
- Front to Rear: 0.7 ± 0.75 mm (or 0.7 ± 0.8 mm, or 0 + 1.5 mm in some instances). This dimension refers to the height difference between the front and rear glass slide/tilt roof panels.
These precise measurements are critical for ensuring proper sealing, preventing water ingress, and minimizing wind noise. The use of special tools, such as 0 493 687 (00 9 340) for checking adjustment and 0 495 259 (51 0 010) for measuring height, underscores the importance of accuracy in these specifications.
Usage Features:
The panoramic glass sunroof system offers several usage features:
- Opening/Closing: The glass panels can be opened and closed, providing ventilation and an open-air feel.
- Roller Sunblind: A roller sunblind is integrated to provide shade and privacy when the glass panels are closed or partially open.
- One-Touch Function: The system supports a one-touch function for opening and closing the sunroof, enhancing user convenience.
- Anti-Trapping Protection: This safety feature prevents the sunroof from closing if an obstruction is detected, minimizing the risk of injury.
- Comfort Function: This function may include features like automatic closing of the sunroof when the vehicle is locked or in response to rain.
- Integrated Components: The system integrates various components like sun visors, interior mirror covers, and hands-free microphones, which are essential for daily vehicle use. The roof function center (FZD) provides control over these integrated features.
Maintenance Features:
Maintenance of the panoramic glass sunroof system primarily involves ensuring the correct installation and adjustment of its components, as well as addressing potential issues like damage or wear.
- Component Inspection: Regular checks are recommended for clips, latch mechanisms, guides, retaining lugs, and wiring harnesses for damage, and replacement if necessary. This applies to the headlining, trim panels, coat hooks, and brake light.
- ESD Protection: When handling electrical components, electrostatic discharge (ESD) protection measures are crucial to prevent damage. This includes leaving components in original packaging until installation, using electrically conductive clothing and antistatic shoes, and only touching housings of electrical components.
- Pyrotechnic Components: Special safety precautions are required when working with pyrotechnic components (e.g., airbags). Only technically experienced and appropriately trained personnel should perform such work, and damaged parts must be replaced.
- Heavy Component Handling: Due to the weight of the panoramic glass roof, assistance from another person is required during removal and installation to prevent injury or damage.
- Seal Integrity: Ensuring the panoramic glass sunroof seal is not damaged during installation is vital for preventing water leaks and wind noise. Adhesive tape may be used to protect critical areas.
- Noise Prevention: To prevent groaning noises, all bolts must be secured with plastic washers prior to installation.
- Initialization: After installation, the panoramic glass sunroof must be initialized. This process involves operating the START-STOP button and holding the sunroof switch towards "Lift" for approximately 50 seconds until the glass roof and roller sunblind open and close completely. This ensures proper calibration and functionality of the system.
- Fault Memory: Clearing the fault memory in the FZD control unit is a post-installation step to ensure all system errors are resolved.
- Headlining Care: The headlining must be handled carefully during removal and installation to avoid folding, which could necessitate its replacement. Support from a second person is recommended.
The document emphasizes the importance of following precise steps and using special tools for accurate installation and adjustment, highlighting the complexity and precision engineering involved in the panoramic glass sunroof system.
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