There are three camps
1. VW USA SAYS NO TOWING AND IF YOU DO THERE BE 10,000 LAWYERS FOLLOWING YOU FOREVER.
2. towing 1000 - 1500 lbs you might be ok, but just put bikes on the back
3. Use the Euro or UK specifications 100KG tongue weight and 15-1800 kg (look it up for your car)
4. Tow whatever you can get moving, it'll probably be OK.
Well maybe 4 or more.
You will have to choose for yourself.