Second service for my Passat was £330. That was back in Feb and was a DSG. So, it seems the price you have been quoted seems reasonable. However, I managed to get the first and second service on my new car for £269. I'm not sure if there is a difference in cost for servicing a DSG and a manual or a Troc and Passat. When I rang to book my car in I was asked if I had been quoted by other dealerships so I got the impression these service charges are not set in stone and can be negotiable.
Aircon service was an extra cost which I declined.