The car does not steer straight, thats the main problem, I guess the steering wheel looks crooked after it starts pulling.

Heres an instance:

I'm on a flat road, i set the steering wheel in to the most straight position, then it starts to pull to the right, the car starts moving rightward, and the steering wheel starts shifting to the right side so the steering wheels is now a couple degrees to the right more. It usually will not turn any more than that, and the car starts drifting to the right.

so...I take it this cannot be a steering wheel issue then.

lets say for instance that the turn signals are not turning off at the same angle. This would not lead me to the pulling problem correct? That proves an off center steering wheel which has nothing to do with the pulling.

I'm just narrowing down what I can do to try and find the pulling.

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Own:
2013 C300 4matic
2009 C300 4matic

Owned:
2001 E320 Sport
1992 500E
1989 300SEL