Thanks, I tried both options:
1. This works (as long as I give the coupon a name) but it's not the best method for me. It feels like a workaround (which is good at some moments).
2. I don't get this working. I look at Sysyem - Configuration - Display - Default parameters for products. Here I see the option 'Show discount price' and 'Price display method'. 'Show discounted price' gives me four options, 'Price display method gives me five options'. For the page before (showing all the products) I use the option of the menu item I use to show these. I test with a product with an original price of € 119,00. Whatever option I choose (at both places) it has not the wanted effect. I want it (at both places) to show € 119,00, nothing more and nothing less. When getting to checkout I want a total price and after that the discount for that customer group.
Any idea which combination of options should work? It's a bit frustrating because some of the options sound so logical, you assume directly you have found the right one. Not...