Hi
I just wanted to say that I have the EXACT same issue that has been described here. I bought the Monte Carlo from a main dealer and asked them to do the tracking because I could tell it was pulling on small roads.
When I collected it the car was dreadful but theu assured me they had aligned it correctly. I took it to an independent specialist who showed me how badly aligned it was and that the tyre pressures were wrong, they also showed me the tyres uneven wearing at the front and the rears were egg-shaped which is what was giving the loud humming on the road.
I went back to Skoda and they agree to a full set of tyres replaced following the reports I showed them, they also replaced a steering upper strut.
I now have pirelli tyres on it I think, it is vastly improved, but like the OP, there is a very slight drift to the left which is only noticeable on the motorway, but the car will drift an entire lane in about 3-5seconds.
I would be really interested to see the OPs alignment numbers so that I could take my car to my specialist to get it driving in a straight line. The OP is right that it is tiring driving for long periods having to hold the car in the lane. The Skoda service manager showed me their full alignement and the thrust angle etc etc, but Im not convinced after the independent were pretty much spot on about their previous attempt and that the tyres were knackered!!
Steve
