Make sure you got a good transmission...the 5 speed automatic is specific to the S320,and it cost 3 times to rebuild/replace(4000$ job at a cheap fly by night place), then a 4 speed auto in the s420/s500,because,in most cases it just needs to be replaced,plantetary breaks ...so,its not rebuildable,its replaceable,making a cherry S320 a parts car, overnight.