Have a 2001 s430, need help
 

I have a 2001 s430 and I bought it used. The problem with the car is that when it drives, it will have this strange sound like the car is pumping itself up, and it constantly goes on. Meanwhile the screen will say Airmatic please vist workshop. Does anyone know what is the problem here because I do not want to take it back to the dealer. The second thing is that I have another malfunction, which says that check 3rd stop lamp, but when I checked it, it works fine. Does anyone know how to reset that malfunction? Last but not all, is that I have the navigation unit and cd player coming on, the unit seems to work, but my radio would not recieve any frequency from any station, therefore my navigation will not work. I am not sure if its an antenna problem, but I am hoping to get these 3 problems fixed. If anyone can help or any advice, I would surely appreciate it.

I had a 2001 S that I was aligning for a body shop. This requires reading the ride height with a Romess inclinamometer. It was wrong so I was trying to calibrate the height (with SDS) and every time I added height to a side the pump ran but the car didn't rise. The pump is under the right headlight and the area was still disassembled and the filter for the pump was dangling. By dangling it had pinched off the inlet and as such no outlet output.

Its not likely that you have such a restriction. Its more likely you have a lousy pump or a big leak if the suspension is down. The point of my story is you aren't tooled for this, the easiest of your three problems.

All three of your problems require a SDS for evaluation and final adaptation.

another problem is that now it says stop, car is too low. Now my rear of the car is down and the pump seems like it is pumping but it will not pump it back up. Next thing is that where would the best place I would have to bring this to fix? And about what kind of price range am I looking into?

Either a dealer or an independent with a Star Tester. If they don't have a SDS/Star Tester they really aren't prepared for your problems.

The late cars need a Star Tester just to do an oil service properly.