It’s most unusual for a fuel-injected car to suffer from fuel vaporisation as you suggest your daughter’s does. Check the fuel pump, make sure the fuel return line is not blocked, and check to see the fuel lines are not too close to the exhaust. It can also be affected if the car is running hot for some reason, so make sure the cooling system is up to scratch.

The switch is on the light. It should have three positions: off, on when it operates independently of the door switch, and the third position is for when it operates in conjunction with the door switch.

While the carmakers will tell you the transmission is filled for life the old timers in the auto business will tell you otherwise. It’s wise to regularly check the transmission fluid, and change it every 20,000-40,000 km depending on the use. You can leave it longer if it’s being used for normal driving, but if it’s towing it should be changed sooner rather than later. The transmission is working fine and it’s got fresh fluid, so there’s no reason to think there’s a problem on the horizon.