ALL Audi sedans/wagons/SUVs have Quattro (all wheel drive); Mercedes has 4matic (all wheel drive, as an option, some sedans/SUVs might have it as an option at Sixt, but not guaranteed. BMW has XDrive (all wheel drive) as an option (not guaranteed) on its sedans/SUVs. Not sure about Jeep and Volvo, maybe someone else can chime in. Can't hurt to ask Sixt to attach a preference to your reservation (was able to do it with Hertz at Hertz Customer Service). Good luck, & safe travels!