I assume the bounce is from the rear? If so then the self leveling isn't working as perfect as you thought. The SLS may rise and fall in the presence or absence of a load, but that bouncey, bouncey says the nitro cells need to be replaced.

__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.