P.S.
If it's the A6 then I reckon it's as much to do with it's engine as anything else.
But nothing beats the magical I6 from BMW, particularly no VAG engine.
To each his own
Without a turbo the E350 simply can't cut it in terms of performance and responsiveness.
E350's na engine should be most responsive without turbos...it does lack the low rpm punch though if that's what you mean?