I am unsure why they have just 190E sportline or 190E without sportline. Under casual observation, that would cover ALL 190's.

The car is probably either a 201.024 or 201.028, you can check the data plate out by the radiator support and find out.
I would say either he was correct in using #2, although it would appear that #6 would be a bit more aimed towards your particular car.

If the alignment is indeed changing after only a short time on the road, it may have some worn components, such a tie rod or drag link ends, ball joints, idler arm bushings, wheel bearings, or control arm bushings.

Gilly