2000 S500 64K miles- initially had problems with clunk and rattle in front end over minor rough roads; they replaced the struts and ball joints.
Then, 6 months later, I was driving and heard thumping from front (sounded like a flat tire, but when I stopped and turned engine off, it continued- I think it was the airmatic trying to "pump"
)- the engine was off and the key was out and the sound continued!
They ended up replacing a ball joint again.
Now, about 6 months later, The front end seems to bounce hard off small creases in the road
Not major bumps, but things like recessed sewer caps (1-2 inches); I feel a harsh bump in
the steering wheel and it seems like there is no cusioning of these sharp bumps, mostly on the
passenger side. I also noticed what seems like a flat spot in the tire but I had it balanced and checked at a tire shop and they said the tire was ok. (the "chop" noise in the tire speeds up and slows down as the car does).
I have brought it to two dealers who have said they can't find anything wrong
under there. Any Ideas? I am going to bring it in again and have the tech ride with me so they
can see firsthand while I am riding along.
Any ideas?
THanks!

 

i wish i can listen to that sound.

ask them to swap front to rear tires and see if the noise is still present.

check and tighten all the suspension bolts/screws.

check for cracks or bent on chassis.

[IMG]local://upfiles/1/49957249C5DF40158492750608109593.jpg[/IMG]

 

A common problem on these cars are the nuts used for the lower control arm. They aren't hard enough for the application. The bolt is fine but after a while the nut loosens and begins to strip. The nut and bolt are no longer tight. Therefore, you have a "clunck" sound going over bumps. Parts houses offer a rebuild kit that will include the oil filled insulator. You will need a torch to heat the control arm to pull out the old insulator (rubber). Use caution, control arm under stress from coil spring. Be careful if you do this job.

Thanks.

SS