His - Denim Blue A220 AMG Line Premium / Hers - Obsidian Black R172 SLK55
Thanks for all the input guys
Must admit that I hadn't considered the Eagle Asymmetric F1's, so will give those some consideration too. Yamaman's comments notwithstanding, I'm still leaning towards the Sport Maxx RT's but the Eagle Asymmetric is an interesting alternative.
So in summary, I'm not really any the wiser, but I am better informed!
The correct sizes for the E63 are listed as being available on the Goodyear website, but none of the major discount stockists list the rears which suggests that it may be an order job from a local supplier.
I put a set of Dunlop Sport Maxx RT on our C Class a few weeks back, they are quiet and grip well in the wet ... very happy with them so far. Sadly I can't comment on what traction off the line with 700 bhp is like though
I took them over Contis as they had better ratings for noise and wet grip.