The boss used to say, "pick a gear, any gear, we're gone."
Absolutely yes. I have this in the 9-3, well okay, not the performance heh. :) It's great when Charlie wants it tropical and I want it British...
Back on the M5 V8, the ride is also pleasingly supple. Not something true of the RS6.
It does work. Although BMW's 155 limiter is considered to be "soft" as in it'll stop you about 165 indicated.
When you consider the energy they have to convert into heat, they do pretty well. I'd imagine the mass is higher than 2,000 kg as well. Assuming it's as portly as a B6 Passat 2.0 TDI, somewhere around 1,700 kg, 300 kg isn't much between four people who like a bit of pie now and again... ;)
Maybe BMW need a drag 'chute..?