Tried this again even more brutally today and afterwards it all worked as it should (thoroughly tested, including resume +++ ) for a while.

Then, after doing a speed increase it cut out and refused to do anything, even using the slider to turn it off and back on. :tuttut:
Luckily I was able to stop easily (advanced planning ;) ) and turn the ignition off and on, after which it started behaving again. :Confused:

So are there any further inputs or thought from anyone on these old/revised/renewed questions:

1. Has anyone experienced the CC system needing a reset of any sort after a glitch or have any idea why? (both why glitches and why reset)

2. Is there any way of taking apart the CC switch section without taking it off the car to investigate/adjust/clean the contacts?

Interestingly today it was behaving somewhat better.
Generally working, but occasionally use of "increase" would cause it to drop out, but pressing "set" would get it going again.

So, no need to turn the ignition off today. :Confused:

However the two buttons are physically connected inside the switch (more like blocking each other as you can't operate both at the same time) so I suspect there's something slightly out of alignment inside there.

Mine does very similar things - I generally don't use increase/decrease functions as they're so slow to react anyway. If I want to change the set speed I just adjust as necessary and press set again.

I never have much opportunity to test in day to day use so it's only an infrequent annoyance for me so I've just lived with it as it is.

Just a little update after having the car for about 6 months now.

I use the cruise control regularly and it now works about 98% with no further "abuse" required. :tuttut:
I think the previous owner(s) probably never did use it and as a result the switches were corroded/dirty. Regular use has presumably cleaned them up.

All functions now work 100% except the "increase" slider and "ignition resets" are never required now.
The "increase" function generally works as it should but just occasionally using it will turn off the cruise function, including forgetting the set speed.
But as Adrian E pointed out it's hardly difficult to use your right foot then press "set", which works 100% nowadays. +++