My TT is my daily also and it gets pretty warm up here on the Gold Coast. First things first replace the radiator hoses theres only 2, new thermostat and water pump. I replaced my radiator with a brand new one too which is only a few hundred dollars, so my whole cooling system is brand new. No troubles at all. People who dont overhaul a 20yr old cooling system are just asking for trouble. Just the same as any car a TT shouldnt get any hotter than an NA in heavy traffic ect.