Check that the rear module seal in the area of the moulded corner, see Fig. 1, has the correct shape.
If possible, do not take the seal off the flange, as this damages the sealing compound underneath. If removal (opening the screw connection) is necessary, attention must be paid to ensuring that the sealing compound is repaired as otherwise new leaks can occur.
Moulded corner on the rear module seal.
Target status:
The gap (3) between the sealing lip (1) and the edge (2) must be 11 mm.
Fault status:
The gap between the sealing lip (1) and edge (2) is too small. Correct the gap by pulling the sealing lip (1) outwards.