The M5's engine fuel consumption is horrendous! I still can't see why its such a technical marvel that BMW make it out to be, isn't there already a 500hp 510NM 5.0l V10 out there made by Audi, I mean Lamborghini?

I used to think the 55K consmption was bad, hence AMG abandoning supercharging for this very reason, but 12mpg in normal driving conditions! The M5 will not be big seller in the UK for this reason....I know consumption is no biggie when talking about sports cars, but a 4 door saloon that beats the CL65 in bad fuel economy?

Regarding the power switch, couldn't they just turn off the two cylinders, as in not providing fuel for them?

regarding their engines blowing up, couldn't they use titanium components for longevity, expenditure aside, just like the GT3?