Hi all,
Had a minor prang (other party's fault) in December and wife's car went into the local VW dealer's bodyshop 2 weeks ago to have a bumper re-spray. Came back a few days later, looking good as new.
However, over the last fortnight, she has been complaining that the ACC has been intermittently problematic, causing the car to lose power when on cruise and sometimes the warning sign indicating an impending crash would flash up with the accompanying loud beep - so I've been meaning to ring them to have it recalibrated or something.
However today it got serious - ACC set at 50mph on the A1m through roadworks (average speed cams) white van man close up behind us and the ACC suddenly goes haywire - loud beep and slams on the brakes. White van went through the cones to avoid us.
So when we got home, I went to see if there was anything visibly wrong with the ACC radar sensor. And found this:

