Thanks. The authorisation is for 4 hours labour to open up and check cylinder head. But, if there is nothing wrong that they find, they I will be charged for the whole work (recharging battery and whatever else).
My worry is that they may find nothing wrong... but the fact that the
(5.5 litres of it they say), just vanished without the warning light coming on.
If they do find a warrantable defect, then I won't have to pay for anything... but I no longer trust them to be honest. Not once have they called me, even the first time the car was with them. I have to keep calling, the service dept is always busy, they never have courtesy cars available (I guess other scenics are breaking down too