Is there such a thing as a factory fitted tow bar? I thought fitting is arranged by the dealer, using a local fitter.
Buying a car without a tow bar means the chances that you are buying a car that hasn't had to work hard towing. Having a tow bar fitted by an independent fitter won't mean you get a "less integrated" unit. You can specify that you want vehicle specific electrics. The tow bar itself will be type approved and quite possibly exactly the same as the "factory fitted" one. The only downside to buying a car without a tow bar is that it will cost you.