Nürburgring – 2 nights
Stuttgart – 2 nights (Mercedes/Porsche)
Ingolstadt – 1 night (Audi)
Munich – 1 night (BMW)
Reckon that amount of time sounds fair, including driving time between each city? I will most likely hire a car, something cheap, haha, to get myself from Frankfurt to Munich.
I'll then be flying to Malta for a couple of weeks before flying into Berlin for 5 days or so, which I will spend one of those at the Autostadt. Then get myself back to Frankfurt and fly home.
I'll be leaving in late March, back in late April or maybe early May.
Any tips on SIM cards for data in Europe, should I do that before I leave or when I arrive???