we have just left autoglas Zentrale Melle. They have removed both cab side windows and replaced both panes of glass each side. 4 new double glazed panes in total. Only slight failure and only noticeable in certain weather conditions. Specific parking for motorhomes with hook up and water on each post. They do loads of motorhomes especially windscreens hence all the facilities. Great efficiency and organisaton but they were horrified when I tried to get them to fit same thickness laminated single glazed. No, no, no they will get condensation. It could be done they said but the dealer, who is paying ordered double glazed units. If I was paying I would have insisted. The adjacent window either side is single glazed and so is the windscreen, more like it is doing themselves out of business. They said between 5 and 10 years was normal before failure Oh Please!. I will post pics before and after when we return in 2 weeks. Oh cost you are thinking, well they told me what the bill is and even showed me. I need a lie down. If I was paying the nearest German kanal would be getting another casualty. Get the beers out tonight hic hic hooray.