Something to shake the car

[swd80]

Is there such a machine that you can put your car on it and it simulates bumps in the road? So a mechanic can get under the car and find the source of a rattle?

My car (Mercedes W204 C320 CDi Sport with dynamic suspension) has had a really annoying rattle for a while now. The sound is a bit like when you're towing a small trailer. It has had replaced front springs (due to a big pothole) and new front shocks (one was leaking) but the noise continues. My local independent Mercedes garage has checked all the suspension, heat shields, exhaust etc etc but can't find anything amiss.

I'm aware of chassis ears that can be attached to the car - does anyone have experience of these and are they useful to get to the bottom of a problem such as this?

Any advice gratefully received!

[swd80]

Happy Jim said:

I walked past my local garage and did a double take when I saw a car inside shaking itself to bits - turns out it's their funky lift thing that they use for MOT's - does exactly what you need and allows the MOT tester to view all the bushes for wear etc.

Jim

I don't suppose you know what it's called? Would help when trying to find one!
Many thanks