Hello Volvo community! I have the following problem: The interior lighting only goes out with massive multiple door knocks. Logically … the door contact is defective! However, I did not find a pen switch like I used to at the Holmen. So assume that the control via a door lock electronics or something works. At cold temperatures it works better, because I can close the driver door completely normally and the interior lighting goes out. Questions A) In which part lies the Defect? B) Is self-assessment possible/recommended? or C) Approximate expense/cost for a workshop? What Dolly Buster would answer I already know … ;o). Greetings Dobrowolsky