If you drive through Germany. don't bank on using Tesla chargers, there are only a handful that accept non-Tesla vehicles. Get a Shell Recharge card if you don`t already have one. You can charge with it at almost all charge point operators throughout Europe. They claim over 500,000 charging points.
See here for Shell Recharge coverage in Europe:-
Don’t wait to charge. Use our live map to see available Shell Recharge points. Find rapid & ultra-rapid EV chargers at stations near you and power up fast!
shellrecharge.com