We usually stop on the E42 here each way:
https://www.google.com/maps/@50.6543.../data=!3m1!1e3
It's a Shell garage and the vPower is 98 ron, so fine unless you're mapped for 99. If so, just chuck a little octane booster in
I usually use NF from Alyn.
Once in Adenau, the Aral sells 102 ron. Yum yum.