I always check fuel flow for shaking first.It can be from filter,screen,lines,or tank under vacuum pressure,from bad vent.Make sure fuel flows freely when hose is removed from line coming from tank.If you have original rack damper bolt on the back of injection pump,the spring may be weak.It helps with the shake.Are valves adjusted right,they can cause cylinders to run out of balance.A weak lift pump can be a problem to and are expensive,a cheap $85. solenoid electric fuel pump will cure that.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt