According to this:
https://secure.avis-europe.com/secur...in=BE&NBE=true
Preferred Plus members get a free additional driver. Since my wife has a Citi Prestige card, I was thinking of using that to get her Preferred Plus status (US-based) and then renting a car in Germany with the intent of getting a free additional driver (me). Other rental companies charge between 4-13 Euros a day for an additional driver, so this could work out to be a significant savings. However, I'm not sure the free additional driver benefit will be honored if the renter has "US-based" status. Anyone have experience with this?