Welcome to iRV2, wheretonow! I don't know what year Winnie you have, but if it is based on the E350 or E450 chassis it will tow the car fine. We towed a 3000lb Acura Integra 4-down behind an E350-based coach with no problems for several years. Most hitches installed on these types of MH's are rated 5000lb or more, check yours to make sure.
What I can't answer is how to tow a New Beetle. Hopefully someone else here can! One thing that might help is is your New Beetle transmission manual or automatic?
Stewart, Brenda and kids
2008 Newmar Canyon Star 3410