I have rented a class b three times in Germany in 2008 ,2010 and 2013 , and always from a company called DRM or Deutsche Reismobile . Normally there is a tax ( VAT) on all purchases in Europe.When renting an RV rent for longer then 28 days and you do not have to pay the VAT.The rental rate was 95 Euros per day at the time for periods up to 28 days .We rented for 31 days and the rate dropped to 76 Euros and to 56 Euros for the four additional days. I believe that DRM also sells their used models . ( as does McRent )
