Anyone asked if adaptive cruise could be installed by your dealer? It was not available when I got my Q7. Or is it one of those things one should never ask a dealer to tackle even if they say they can?

With all the electrical problems that Audis are prone to have, to trust your accelleration and braking to mor of Audi sensors does not make sense.

Agree it's just one more thing to break - but I've never had any major electrical problems with an Audi I've owned or that my family has owned in the last 10 years. Recent gains in the German quality rankings and an ok result in the US JD power survey don't point to anything major either.
What kinds of issues are you seeing?