I just bought a 2007 GL450 and installed new Michelin Latitude tires on it. The old Goodyear Fortera tires had really bad cupping on the inside of both rear tires. I then immediately took the GL to the local MB dealer for an alignment.

Based on the "before and after" numbers shown below, I'm worried I still have Camber that's too negative (close to leftmost edge of normal range on the graphic) and, that my new tires will get the inside cupping eventually, despite my planning on doing rotation on time.

1. Are these numbers acceptable?
2. Did the dealer do much at all based on the before and after differences?
3. Should I take it back to the same or another dealer?
4. Are Camber and Caster really adjustable on the GL450 Air Suspension?

Thank you in advance

Camber:
Before: FL -2.02, FR -1.54, RL-2.56, RR -2.31
After : FL -2.02, FR -1.52, RL-2.47, RR -2.42

Caster
Before: FL 6.34, FR 6.11, RL n/a , RR n/a
Before: FL 6.36, FR 6.17, RL n/a , RR n/a

Toe
Before: Toe Pressed(Front): 0.34 FL , FR 0.00; Toe(Rear) RL 0.19, RR 0.23
After : Toe Pressed(Front): 0.08 FL , FR 0.11; Toe(Rear) RL 0.27, RR 0.27

Total Toe Pressed (Front)
Before: 0.34
After : 0.18

Steer Ahead
Before: -0.07
After : -0.06

Thrust Angle:
Before: -0.02
After : 0.00

 

I dont know the numbers; but if they are set dead on the vehicle tends to wander and be camber happy, had the same problem. after a 4 wheel alignment check and adjust. took it back and said the drive was terrible and they toed it in or out a little seems to have sorted it. worn tyre or wander, it a choice.