Audi A6 4.2 Lexus 450h Mercedes 420CDI
 

Auto motor und sport test. But not he whole article only technical data and test results.

1st Place: Mercedes-Benz E420 CDI (507/600)
Best all-rounder. Sporty, yet comfortable (almost as comfortable as an S-Class) and frugal with fuel. The V8 diesel engine isn't the best companion when it comes to sporty driving.
2nd Place: Audi A6 4.2 V8 Quattro (492/600)
An overall competent car. Good handling qualities coupled to a fun V8 engine. The only downside is the high fuel consumption.
3rd Place: Lexus GS450h (467/600)
The hybrid drive is convincing, but mainly in the city. The suspension is hard and uncomfortable and the luggage compartment is virtually non-existant.
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Kinda strange comparison.