At Startselect you can use all sorts of payment methods to buy your Steam credit. This means you can also buy Steam cards with direct debit:
Buy Steam credit with PayPal
You can use PayPal to buy Steam credit with direct debit. When you link your bank account to your PayPal account, the amount will be deducted from your bank account when you purchase a Steam card.
→ Buy Steam credit with PayPal
Buy Steam credit with Klarna
With Klarna, you can buy your Steam credit now and pay later. After purchase, you get 30 days to pay for your Steam card. You can even choose to pay back the amount in instalments.
→ Buy Steam credit with Klarna
Buy Steam cards at gas station or supermarket
You can also buy Steam cards at gas stations or supermarkets all over Germany. For example, Aral, Shell, Jet, Couche-Tard, and Esso stations or LIDL, dm or REWE stores. Typically, you can use cash or your bank card at the checkout.
→ Buy Steam credit at the gas station or supermarket