I am not sure if he's a BMW dealer mechanic... forgot to ask him.

He basically told me that the lights are not relevant to the accident but no information what's causing the problem... The car is due to be back tomorrow morning. I've contacted another BMW dealer in my town and am going to book a inspection service (£275 out of my pocket, the car is due a service in November though), which I guess should conclude what's the problem.

Please advice if I've been too kind to them.