We'll assume the alignment is correct, but has anyone accurately measured the wheelbase both sides and did they check caster, all four wheels might be aligned perfectly but if the distance between the front and rear wheels is anything but identical it will have a pulling effect.

Couple of other long shots, try and measure the turning circle both ways, its possible that during rebuild the rack was disconnected/renewed or new track rod ends fitted, possible that the natural centre point of the steering rack (or are Mercs still steering boxes) isn't with the wheels dead straight...if that makes any sense.

Lastly it could simply be a weak or damaged suspension bush compressing more than the rest as speed increases one side to go out of line, arguably that might be on the nearside as its likely the offside bushes were replaced during repairs.

Course it might be none of those things.

Sometimes its useful to drive another car and have someone drive yours on the open road, over various surfaces, watching how your car behaves can reveal problems that you would otherwise miss.

Edited by gordonbennet on 06/03/2017 at 12:38

Initially I'd take it to a second alignment centre / garage.

I've been told before that my alignment is spot on yet still find the car pulling. Another place found an issue and corrected it.

Years ago I had two different places saying it needed different settings - one slightly toe-in and one slightly out.

I've also had the annoying situation of the alignment being spot on after being corrected but the steering wheel is off centre.

Edited by notagoodname on 06/03/2017 at 12:28

I had an SLK from new in 2012 (sold last year) and it pulled to the left from new. I too got it checked on a HawkEye rig and was told everything was in tolerance. Despite swapping wheels and a change of tyres the problem never went away. The dealer didn't want to know, "they all do that Sir".

Not that this helps you but I guess you were fine until the accident?

Edited by csgmart on 06/03/2017 at 19:07

I have a Mercedes SLK 280. A few months ago it was in a minor accident and the front drivers side wing was crushed a bit on to the wheel. Bit of front end damage too.

It was repaired under under insurance. After repair, it was taken by the repair shop to a specialist wheel alignment place, who gave it the OK. I have confidence in them - they use Hunter HawkEye and many London dealers take cars to them.

I don't know about Mercedes...

However after a similar minor collision in my Hyundai i20, and repairs by an Authorised Hyundai repairer, its steering was pulling to the right: Climbing up the road-camber. This despite assurances from the repairer that the car's geometry etc. were OK.

The repairer's mistake was that they left the steering wheel slightly crooked and had not reset the Steering Angle Sensor in my i20's electric steering. Although resetting this sensor is a simple task, it probably requires the main dealer's special equipment?

Presumably your Mercedes has hydraulic rather than electric power-steering, and I guess that it has more sophisticated adjustments than my i20? So perhaps one of those is wrong?