Ive got a 2004 TT Cab and found with a few minutes work you can actually load a mountain bike in it and put the top up.

Rear wheel, helmet, shoes and rest of gear in frunk.

Loosen seat and stem. Turn handlebars 180 degrees.

Bike and front wheel fit pretty easily in back seats with space to put top down. Just wrap something around the frame to prevent scratches to the leather.

No need to mount a bike rack.

When I was getting ready for my ride even the guy parked behind me was impressed lol