Why does Goldcar keep adding more hidden car-hire charges?

We expected the hard sell of extras – but not a ‘diesel tax’Back in March we used Holiday Autos to book a car to be supplied by Goldcar in Marseilles. When we picked it up in August, we got the standard attempt by the local agent to sell us extra insurance and things such as a satnav. We weren’t expecting a €30 diesel tax.When we pointed out Holiday Autos booking stated “taxes and charges included”, the manager rudely said “Pay it or no car”.