If your debit card does not show the MAESTRO sign youīre out of luck in Germany ...
The V-pay system has not really been established yet - itīs still relatively new here in Germany and the Mastercard/MAESTRO company is obviously not going to share the market with new entrants voluntarily ...
Plus merchants usually pay a fixed rental for the debit card "swipe machine" and are not willing to pay for a second system thatīs not really used anyways ...

The reason for non-acceptance or limited acceptance of credit cards in german stores (in particular supermarkets - but not limited to) is simply because thereīs a huge difference in the commission the dealer has to pay to the CC company compared to the debit card system.

CC companies take about 2-3% off the total but the debit card system charges a "flat rate" of less than 50 Cents regardless of the total amount ...