For sliding/tilting sunroof or panorama glass roof: Check the guide rails and water drain channels for contamination

Prerequisite 

The glass slide/tilt sunroof panel is open.

Check 

• Check guide rail (1) and water drain channel (2) on left and right for contamination.

Courtesy of BMW OF NORTH AMERICA, INC.

Result 

» Guide rails and water drain channels are contaminated.

Measure

• Clean guide rails and water drain channels and issue a separate invoice.

Check whether water drain hoses are clear.