Why does my 1989 shake violently when I go over a bump in the road on 1990 Mercedes-Benz 420SEL

I've had a wheel alignment and balancing. It does fine at speeds so far up to 70mph. but hit a bump or pothole and it shakes terribly.

by in Leesburg, VA on March 27, 2012
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
2 answers 3 comments
ANSWER by , March 27, 2012
Your steering dampner has failed
COMMENT by , March 27, 2012
Thank you!! How much should the repair for a steering dampner cost? Will I damage my car if I drive it for about two weeks?
COMMENT by , March 29, 2012
replacement cost parts and labor $170.00 you should be ok but slow down until you can afford the repair
ANSWER by , March 27, 2012
I would suggest to have the alignment double checked making sure the caster setting is correct.
COMMENT by , March 27, 2012
okay, thanks!