Just joined the forum and hoping to learn lots about my Audi.

I have an A3 Quattro S line with S tronic box and 185 BHP diesel engine. Interested to learn if it can be remapped but undectable to the main dealers?

Not sure if superchips do a bluefin for your model or not? If so, they do a handset that allows the map to be removed and reinstalled easily in a couple of minutes....

They quote this:

http://www.mybluefin.co.uk/search?make=2&fueltype=2&model=21&variant=2947

but don't say how its installed or if its detectable to the dealer.

Looking at that link if you get the Bluefin handset then you will be able to remove it with that and reinstall it.

Probably best talking to superchips to see if it will be detectable. Can't think it would be a problem if you removed it before it goes in etc. Superchips also have some sort of warranty if the map were to cause any problems etc so that's worth checking out. I had a bluefin on a previous car and I can vouch for it being a good product.