as far as i can remember both these items run off the same fuse, check the fuses to see if any have blown , robb
on my 53 vectra you have to unlock all the cr doors ie press remote twice. petrol cap will then open
under bonnet next to the batttery
At about 51000 miles for 1.8 petrol
specify nature
What model gearbox is in a vauxhall corsa 1.4 16v petrol 98 reg F13 or F15
10w/40 part syn
10W40 semi synthetic.
needs to be done with a diagnostics machine.
5w-30 grade. 15w40
Generally the F17 has reverse Top LEft, and the F23 Bottom Right.
Petrol 4 cylinder, about £250. Diesel 4 cylinder, about £350./ Petrol V6, about £450. Diesel V6, about £600. All Very "Approximate".
i would 50/50 it just to be on the safe side as you dont want anythign to freeze up.