hi, 3 days ago i had all 3 plastic rear windows on my 92 500sl replaced, by the way the price was only 175.00 cheap. now the problem started, the top light remains on and it beeps unsafe, i then put the top up and down many times and now it seems to also be out of sequence, end result, car in my garage with top partialy on. the window man told me he had no idea as to why this problem. please help thanks sven.