Looked at a L405 today where the rear door functions were a bit troublesome. The door was locking and unlocking and soft close working, but not window. The owner said the rear door lock was changed as the door functions have not been fully working and beeing erratic.. What could be the reason for the trouble? Could it be a faulty wiring loom?

Also front cameras not working. Are these replacable wit some cheap ones from Ali Express / eBay?

Br Martin