Hi Ivo
If you are going to do the adjustments yourself or just want to check them, carry out a chassis drop test.
All you need is clean garage/workshop floor, plumbline, and chalk.
hang the plumb line from the same points left/right of centre line on the chassis and axle then mark on floor with chalk. once all marked, move car away and measure chalk marks, this will show you where they are out or if anything is twisted.
ttfn
gaz