I can not believe that you tested a CLS 63 AMG and your still considering buying an Audi? May I ask what's the matter with you? lol.
I had a little r4c3 with my friends 2007 S5 V8, I was in a 2001 E55 AMG, I left it about 3 cars behind trying to catch me joining the dual carage way... but to be fair the e55 had been tuned.
Sorry but 4wd is boring, the only Audi I like is the R8's!
While the CLS was an astonishing car, I just feared the RWD with that much power.
So, while a RWD AMG will remain on my wish list, I knew that having 4WD would be a great way to introduce myself to 400+bhp motoring.
When I drove an Audi S5, I was blown away at how well in handled, compared to my 124 Coupe. Then driving that RS4, it was even better!
4WD could be classed as boring, however it's very reassuring in wet conditions
Even my E Coupe likes to spin it's inside rear in the wet, whereas the Audi just grips and goes!
Also the power split on the RS4 is 40/60 bias RWD, so in certain conditions, the back end can be encouraged
I have to admit, the one thing the RS4 lacks is low-down torque, but that just means I have to use the gear knob a little more
The RS4 has 317lb/ft torque. Even the S5 has more torque, at approx. 325lb/ft. A W210 E55 has approx 350lb/ft.
Also more power is lost through a 4WD drive train.
A standing start in the wet, the Audi would win out. Around a track, I would say the Audi would win.
Mid range and straight line in the dry, the Merc would win for sure.
Back in July, I had a day with an R8. It was an astonishing car. Being the V8 version, it wasn't
that much quicker than my car, although the handling was sublime! Also more power is shoved to the rear of an R8, so the back end was extremely easy to step out.
In the current Audi line-up, the R8 is the only car I would have.
Seeing as I can't afford an R8, the RS4 will have to do!
Darren