| I know what it is!!!!
I am a technician at a Mercedes dealership, mercedes have a similar steering setup to a landcruiser ie not rack and pinion. Anyway on the steering setup there is a shock which commonly goes bad on the benzs causing exactly what you just described. You hit a bump and the wheel starts to shake, the shaking will not stop until the truck stops. when you start off again, the wheel will be fine until you hit another bump in the road.
The good news it is a very cheap easy fix. If this doesn't solve your problem, you are out less than $50, $100 installed.
Dave |