My fabia suffers from an intermittent fault. Sometimes equipment, such as the windscreen wipers, the air-conditioning and the side-windows will stop working. This can be more serious, such as when driving, the headlights will stop working, as will all the others lights on the car. Sometimes, the car will just go dead, as if it had ben switched off.

Since the car is only 14 months old, i have taken it back to Skoda. they found that a relay box was loose, which they tightened up. They advised me that should the fault happen again, to lightly tap this box, which is situated near the fuse box. When the car switched itslef off on the M25, at 9pm, I took the car back again, but they could not find any fault, or record of it in the car's computer.

Has anyone had any experience of this and, if possible, no what the remedy might be?

The car is still under Skoda warranty, so the dealer needs to make sure the faulty is fixed. Tapping the relay box is not the sort of advise I would expect from a dealer.

Speak to Skoda assistance and explain the problem.

Real difficult to find a fault though that isnt apparent.

Check obvious things like battery terminals and earths etc and probably worth looking at the BCM.