read the OWNER'S MANUAL.. all tCs have it and if they don't have it, it means they bumper was probably replaced somehow. the circle is where the towing thingermajigger goes. When u need to be towed by one of those crane type towtrucks, you need to remove the circle and screw in the towing harness for the tow truck to hook onto. If u dont know this with a crane type towtruck, he'll just rip off your bumper or something worse. again... try reading your owners manual!
do you see that many tCs on the road? i for one have only seen about 2 since they've come out. anyways... it comes with every tC and why u didn't see it on one is something u can ask the owner if u can wave them down
Damn, someone ate their bitchy-O's this morning, It was a valid question, I was actualy wondering the same thing. As obcessesd as I am I haven't read the owners manual cover to cover yet, and prefer finding my information on the internet as I have a ton of downtime at work.