MOST OF THE badged 500's have the same engine profiles- almost. WHEN it says 500- it usually is the same engine- I'd go for the lower miles. PLease check history. This is very important.
The only differences on these automobiles are the options ie: sport or standard SL models. 129's are awesome automobiles
1978 280 CE silver
1986 560 SL black
1987 300 SDL cream
1994 SL 500 brilliant green
1997 E 300d dessert silver
2005 FORD F250 Superduty Crew cab 4x4