Club 80-90 Forums

I have just bought a 1985 VW Karisma. I have four keys. Ignition key does all the doors. petrol cap has a key. Two others do nothing so far. I cannot get any of these keys into the side water cap lock. Any ideas on how to proceed? What would you expect the other keys to do?

Should be able to unscrew the water filler from outside, disconnect it from the hose that feeds the water tank and replace it.
As usual Brickies do 'em.

Has the same problem. Once I identified the correct key(I had it all along) I realised that the lock was not for turning. As it turned out the barrel was completely rusted. I removed the cap with a good twist from a vice grip. Obviously broke the lock. So had to pita new cap on. Not an easy find, in the end had to bodge something together.