Originally Posted by
JSCL
Have you ever tried driving in to Switzerland?
Don't forget you'll need to pay for a vignette in addition to the car rental company fees for cross-border. Driving across the Swiss border isn't always an easy task if you don't have Swiss plates on.. expect to be searched.
Also hiring a car in Switzerland during ski season, you're likely to have a car supplied with winter tyres on. In Munich? I doubt it. Not as simple as it seems from the armchair.
From personal experience I can say that it can be hard to get a car with winter tyres in Munich, even if you have specified winter tyres when booking. No issues getting into Austria of course but you wouldn't want to drive in the mountains without winter tyres.