I know for a fact that every possible maintenance issue concerning 500Es has been discussed here, so if you've dona a search then you've read it all.

Drive both cars, then decide. The 500E has a completely different feel than a 400E; a 400E is much more like a 300E than it is a 500E. When new, the 400E only cost $7-8k more than a 300E as I recall, whereas the 500E was about $20k more than a 400.

__________________
"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo