I'm not sure but I think that the OP's original question is whether the CPO covers towing e.g. for a flat tire. I assume that the CPO continues Porsche Roadside Assistance while it's in effect, but to be sure, I would check the policy literature, or call them (800-PORSCHE).
I'm sure it wouldn't cover the tire itself, but I was just wondering about the tow. If they would tow to a discount auto tire or just a Porsche dealer. Just towing to a Porsche dealer is like those "free limo rides" in Vegas. Yea, it's a free ride, but straight to gentlemans club where one could dump a grand easy!