Snallbans

I will try it, but I suspect an open pipe would make the locks inoperable. Thanks for the idea.

Thank you Cliff. I was thinking on similar lines but was unable to get a view of the driver's door lock. It is well hidden behind the steel frame. If I could access it there will be an electrical connection to either the vacuum pump or electric replacement where I could link the remote control to. I will attempt to see if I can hear some pump noise over the mechanical sounds. 

Hi, I have an A8 D2 circa 2001. It was originally fitted with Vacuum central locking and infra red remote. The central locking works fine, but the remote does not work. When I looked in the Trunk / Boot for the vacuum pump it was not where it should be. There was just a pipe and nothing else. As far as I can tell it still works through vacuum but where on earth have they moved the pump to. I have asked 2 garages to try and find it but to no avail, nobody has any idea where to begin the search. The garages are not Audi specialists and the car is old so I am asking the Forum where the most likely places are for someone to have moved the vacuum pump to. As the central locking still works it is in the car somewhere but I have no idea where to start looking. Any suggestions will be warmly welcome. 

If that is the case I think the only option is replacement glass.

Yes, it appears the dis-colouring is in the middle of the double glazing. I can only think replacement glass required. Probably expensive if available. Any suggestions welcome.

Has anyone had a problem with the side windows discolouring as in the photos. Is there any cure other than replacement glass?