I've had ma Cupra R for a couple of weeks now and have always left the A/C on
Cannot really comment if it uses anymore petrol/power, but I have been getting 300-350 miles out of a full tank and that included giving it a good old boot every now and then.
I always thought it is healthier if the A/C was left on constantly?
I had a
problem with my coolant dissapearing every couple of days and it turned out to be a leak from the radiator. Has to be said though, the SEAT garage I took my car to in Stirling were excellent and it was all sorted out under warranty.
The only
problem was that I had my pride and joy taken away from me for 4 days
Lucky for me my sis has a Volvo S60 T5 and I got to borrow that
My car still pulls to the left like a B**ch! Had a full allignment done and checked the pressure/balance on all the wheels, but it stills pulls
Looks like I may have to live with it!
Not too fussed though, as the rest of the car makes up for it
Cheers