Hi guys, I had a funky problem with my 3 series G20 earlier this summer after a windscreen change by Autoglass. Automatic windscreen wipers stopped working, came up with a fault and the car started beeping it's horn twice going over heavy bumps. Had the RAC out to look at it and they found nothing wrong, took it to my local BMW dealership and they couldn't replicate the problem, but they did confirm that the rain sensor was throwing an error and they said the camera had not been recalibrated. I have those faults in writing. A few weeks of inconvience without the car and £200 lighter in the pocket I wrote a complaint e-mail to Autoglass. 2 months later, this morning they replied rejecting any fault on their part saying their system shows it was calibrated correctly when the screen was replaced by them, and as I don't have a bit of paper from BMW saying they replicated the fault being directly because of an incorrect calibration they deny any blame.
I assume rain sensors and camera's don't just uncalibrate themselves?
Bottom line, before I dropped it off at BMW it was blowing the horn everytime i went over a bump at over 50mph + rain sensor not working or going nuts. When I got it back, after BMW just recalibrating the camera and rain sensor = no more horn.
If it's just one of those things i'm happy to let it go, but don't want to have had to pay over £350 for screen (insurance excess) + getting things fixed if they clearly screwed up.
Thoughts?