Just a brief question

A 2 Year old Merc.

Why would it try and steer to the left permanently?

The tracking was apparently done, but it still steers quite badly to the left.

Any ideas?

wishbones chuffed,or its hit a kerb and knocked somethin outta shape

Could it be a PAS problem? I don't know, I am just wondering for future reference

Could be bushes on the wishbones if your luckey, if your not bent/twisted chassis from a crash.

Check all suspension components etc for damage too

Buckled wheel? Probably the tracking not done properly. It's basically facing the wrong direction if it wanders as soon as you take you hands off the wheel.

Providing the vehicle has not been involved in an accident then pulling is caused by tyres.

Normally the tyres are worn unevenly which causes the vehicle to pull.

Try rotating the wheels, front to rear and see if it makes any difference.

If the car is only 2 years old then surly its still covered under warranty ?