Well, they say the 400E is a 500E at 90%. I think its an ambitious project, if its what you want. I gather the car will be a lot more forgiving to drive/maintain. This car reminds me of the Turbo-Look option Porsche 911s of the 1980's. Some enthusiasts wanted the show and not the go. Though rare now, they are an aquired taste. Though my favorite conversions are really downgrades: narrow body 911s, de-baged M5s, and Short wheelbase Mercs, with the big engine. My dream conversion? A 450SEL 6.9 in a 300SD body.