Technical solution Transaction No.: 2009147/5
Sun roof leaks Release date: 29-Aug-2006
Problem description
Water comes out of the inside light through leaks in:
1. the windscreen,
2. the inside rear-view mirror,
3. the sun roof.
Cause
1. Leaks in the windscreen:
• The laser welding seam is not covered by the window bonder.
2. Leaks in the area of the inside rear-view mirror:
• Faulty seal in the area of the earth strap of the heated windscreen.
3. Leaks in the sun roof:
a. When working on the moulded headlining the guide pin of the moulded headlining can press the drain hose behind the fork of the mounting plate. This creates a gap between drain hose and neck, which causes a leak. The drain hose can also be so unfavourably positioned, that the water would have to flow upwards. When driving the water in the sun roof frame surges over, drips into the moulded headlining and leaves at the lowest point (inside light).
b. The seal between roof skin and stiffening frame is insufficient.
Production solution
1. Leaks in the windscreen:
• Improvements - continuing corrections after deviations are recognised.
2. Leaks in the area of the inside rear-view mirror:
• Improvements - additional seal between windscreen and earth strap the heated windscreen.
3. Leaks in the sun roof:
a. Guide pins on the moulded headlining, from week 25/ 2006.
b. Improvements - fail-proof application of bonder and change of angle in the moulded areas from 09.2005 - Chassis No.: 7L5 D 076 685.
Service solution
See also the TPL ⇒ “ 2007232” .
Because of its coating the inside of the moulded headlining neither absorbs nor permeates water. The water gathers in the moulded headlining and depending on the vehicle movements, runs towards the lowest point. The lowest point of the moulded headlining is the inside light. The water leaves on the inside light.
The fault finding must therefore be performed in stages.
First step:
• Check the bonding of the windscreen with the V.A.G 1842 or with soapy water and an air gun for leaks.
With leaks in a laser seam:
• Remove the windscreen according to the ⇒ “ repair manual” .
• Prime the leaking laser seam.
• Seal off the leaking laser seam with 1K window bonder DH 009 100 03.
• Refit the windscreen according to the ⇒ “ repair manual” .
Only on vehicles with heated windscreen:
• Remove the console in the moulded headlining (1) according to the ⇒ “ repair manual” .
• Remove the sun visors (2) according to the ⇒ “ repair manual” .
• Protect the moulded headlining in the windscreen area against getting dirty.
• Carefully pull down moulded headlining. Make sure it does not get kinked or damaged.
• Continuously seal off the area between windscreen and earth strap with 1K window bonder DH 009 100 03 (arrows).
• Refit the sun visors according to the ⇒ “ repair manual” .
• Refit sun visors and console in the moulded headlining according to the ⇒ “ repair manual” .
Second step:
• Check the adjustment of the sun roof and correct if necessary.
• Check the seal of the sun roof for damage or deformations.
• Open the sun roof and fill water in the drain channel - watch out for any water coming out of the drain hoses and the neck.
Third step:
To ensure that the drain hose on the moulded headlining is not pressed behind the fork, remove the forks and the guide pins on the moulded headlining. The reason is described under ⇒ “ Cause” , point ⇒ “ 3 a” .
Remove forks and guide pins as follows:
• Remove the moulded headlining according to the ⇒ “ repair manual” .
• Remove the metal reinforcement (2).
• Separate the fork (1) on both sides with a suitable tool from the metal reinforcement (2) (dotted line).
• Deburr the cutting lines on the metal reinforcement (dotted line) with suitable tool.
• Remove the left and right guide pin (1) with a suitable tool from the moulded headlining.
Further procedure:
• Remove the sun roof according to the ⇒ “ repair manual” .
• Seal off all gaps with 1K window bonder DH 009 100 03 (see illustration 1 and 2).
Illustration 1
A = roof skin with stiffening frame, view from inside
B = stiffening frame sun roof
Blue = area: Additionally seal off the stiffening frame on the inside
Illustration 2
Red = areas: Seal off sun roof, gap between frame and roof skin.
• Refit the sun roof according to the ⇒ “ repair manual” .
• Refit the moulded headlining according to the ⇒ “ repair manual” .
Accounting instructions
Service number/damage code/manufacturer: 5103/ 050/ ...
Seal off the laser seam in the windscreen (without removing and installing moulded headlining)
Main operation
Associated operation Repair operation Designation Time units
Main operation 64 10 19 00 Remove and install windscreen 290 TU
Associated operation 51 03 51 981) Seal off roof 40 TU
Total: 330 TU
1) This repair operation must only be used with the TPL 2009147/5.
Seal off the laser seam in the windscreen (with removing and installing moulded headlining)
Main operation
Associated operation Repair operation Designation Time units
Main operation 64 10 19 00 Remove and install windscreen 290 TU
Associated operation 70 84 19 991) Remove and install roof trim 160 TU
Associated operation 51 03 51 981) Seal off roof 40 TU
Total: 490 TU
1) This repair operation must only be used with the TPL 2009147/5.
Sealing in the area of the earth strap of the heated windscreen
Main operation
Associated operation Repair operation Designation Time units
Main operation 64 14 51 99 Seal off windscreen 90 TU
Total: 90 TU
Check and adjust sun roof
Main operation
Associated operation Repair operation Designation Time units
Main operation 60 05 05 001) Check and adjust sun roof 50 TU
Total: 50 TU
1) This repair operation must only be used with the TPL 2009147/5.
Check and adjust sun roof,
Remove the forks of the metal reinforcement and the guide pins from the moulded headlining,
Seal off stiffening frame of sun roof.
Main operation
Associated operation Repair operation Designation Time units
Main operation 70 84 19 00 Remove and install roof trim 250 TU
Associated operation 60 05 05 991) Check and adjust sun roof 40 TU
Associated operation 70 84 49 991) Modify roof trim 30 TU
Associated operation 51 03 51 991) Seal off roof 70 TU
Total: 390 TU
1) This repair operation must only be used with the TPL 2009147/5.