steering wheel turns into a corner when parking and going forwards

[hk20000]

it's a minor problem but I never felt anything like this in other cars before I should ask:

when driving at very low speeds, say in the parking lot, I can steer the wheel one round to the left/right and let go, then as the car moves forward the steering wheel will automatically rotate until it hits the lock....I have to "steer towards center" to keep the car from "oversteering" into the car in the next spot.

My guess it's just the almost extreme caster angle that came factory from Mercedes but could it be some odd parts broken? What does the steering shock do and will a dead steering shock do that to my car???

It's a 1995 W202 C220 btw.