I don't think there is anything new here.
The quote indicates CDW (as in full coverage with $0 excess is NOT included in rate); you will have an excess (deductible) and I'm sure you can buy something with less excess on-site. This is normal even if a US renter rents with Hertz Germany.
SLI is not sold in (Western) Europe because coverage in excess of several million Euros are already included.