1)No credit card coverage will provide the basic third-party liability insurance (TI)
2)Even if it did, no credit card coverage will work if you are in breach of your rental contract
Austrian T&C's allows you to bring up to PDAR in Slovakia.
You could park your German car in Vienna, pick up another car, go to Bratislava and be back in Vienna 3 hours later to drop the Austrian car and pick up the German one.
While it is indeed less comfortable than paying an extra, it does beat driving uninsured IMO.
http://car-rental.sixt.com/php/terms/view?liso=AT&rtar=000&view=EPP&tlang=en_GB&style=t ypo3
Cross boarder rentals with Audi, BMW, Mercedes-Benz and VW cars up to and including group PD**/PW** as well as all Jeeps/Offroaders up to and including group FF** are allowed to the following countries:
Andorra, Belgium, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Great Britain, Germany, Hungary, Ireland, Italy, Liechtenstein, Luxembourg, Monaco, Netherlands, Norway, Portugal, San Marino, Slovakia, Slovenia, Spain, Sweden, Switzerland and Vatikan City.
Cross boarder rentals with the above mentioned car groups are not allowed to the following countries: Croatia, Estonia, Latvia, Lithuania and Poland.
Originally Posted by
Schweden
Or... Rent a non (fancy) German car
The problem with that is that Sixt forbids all Audis, BMWs, Mercedes, and even Volkswagens from Eastern Europe. Looking at Sixt's Vienna offerings, trying to rent an automatic would be a hit and miss as the lowest automatic class quoted is FDAR, which means it could be a BMW, Mercedes, or Volkswagen sedan...
While driving into forbidden countries would most likely invalidate Sixt's included third-party insurance, I'm wondering if my personal car insurance's rental car liability insurance could replace it? If so, the only risk I would have is driving without LDW, although this could possibly be covered by my credit card.
Sixt should really make a paid add-on to be allowed to drive FDARs and PDARs into Eastern Europe. They do offer higher-end German cars in Eastern Europe already so they could just add on a fee to make up for the added risk with cars originally rented in Western Europe.