Odd tyre wear

The following problem with my Aero Cabriolet: I measured the profile depth of my summers today, as well as winter tyres. I found that there is always a difference of 2 milimeters in both summer and winter tyres at the front right!I have three tyres with 6mm profile and one with just 4mm Furthermore, the car pulls continuously slightly to the left.The master says sawtooth and your…. PS:I only have 19000 km on the clock, a shock absorber should be the same not be after yes.