Prepare Panoramic Roof For Installation - AR77.21-S-0750-14E

Model 447.7/8, 448.8 

Do not touch bonding surfaces with bare fingers and bonding surfaces must be free of dust, oil, grease, wax, dirt residues and other adhesive components. Otherwise the strength of the adhesive connection can be impaired and proper adhesion of the adhesive material is not ensured.

Only use materials from approved repair kit and observe the processing instructions without fail.

Otherwise the strength of the adhesive connection can be impaired and proper adhesion of the adhesive material is not ensured.

Object and room temperatures must be at least 15°C and may not exceed 35°C.

Otherwise the strength of the adhesive connection can be impaired and proper adhesion of the adhesive material is not ensured.

Courtesy of MERCEDES-BENZ USA

1. Cut back existing adhesive bead (1) on the panoramic roof (3) to a residual height of approx. 1 to 2 mm and detach residual pieces of the adhesive bead (1) that have not been fully cut off.

   When reinstalling previously removed panoramic roof (3).

   The present adhesive bead (1) should not be higher than max. 2 mm.

2. Remove old spacers (2).

   When reinstalling previously removed panoramic roof (3).

3. Fully remove adhesive bead (1) present on mounting locations of spacers (2).

   When reinstalling previously removed panoramic roof (3).

4. Remove cutting residues at panoramic roof (3).

   When reinstalling previously removed panoramic roof (3).

5. Clean bonding surfaces.
6. Repair damage to surface coating at panoramic roof (3).

   When reinstalling previously removed panoramic roof (3).

   Ensure that adhesive material is later applied only to cutback adhesive beads, to the original factory primer or a Mercedes-Benz Group AG-approved repair primer.

   Otherwise the strength of the adhesive connection can be impaired and proper adhesion of the adhesive material is not ensured.

   Use only approved primer fillers and primer sticks:

   https://xentry.mercedesbenz.com 

7. 1. When reinstalling previously removed panoramic roof (3).

      If there is no residual adhesive material in the bonding area onto connecting flanges that are no longer accessible after installing side roof paneling.

   2. When replacing panoramic roof (3)

      Apply primer on entire bonding surface on panoramic roof (3).

8. Attach new spacers (2), as shown, on inside edge of contact surface of panoramic roof (3).

   Note positions of new spacers (2).

9. Set down prepared panoramic roof (3) with inside facing downwards on suitable assembly stands.

   Carefully handle prepared panoramic roof (3) and lay down.

   Bonding surface can otherwise be contaminated or spacers (2) can fall off or slip.

   Helper required.

10. Install one cup suction tool in each corner area of panoramic roof (3).