Roger Mills wrote:

Andy Burns wrote:

Roger Mills wrote:

I suppose that since cruise control only works on the throttle - and
not on the brakes - there is some risk of exceeding the set speed on
a steep decline.

Mine slows itself in exactly that situation using the brakes.

Interesting. What car is that?

Audi A4. I presume it uses the ABS reservoir in the same way it does to
hold the car on the brakes (not the "hand" brake) when stationary. It
also periodically "wipes" the brakes to keep them dry.