It did have an air intake code a while ago - so I changed the lamda sensor and changed the MAF to an original VW part- the service was done 1k ago as well - the car was drinking petrol but all that is sorted - got the brake discs, pads changed as well. The car as far as i know has no problems at all and goes through all gears nicely right up to 6000 revs.
They were right about the long term damage- sorry what did I say??