Audi 90 20V Rear Diff

[golfvr6]

Does anyone know anything about manual diff lock on Audi 90 20V quattro. Press the button down ,it lights as normal but the diff lock doesn't work. Any ideas?

[richandhazel]

Have you tried that site I use? I don't think there is any mention in the 'problems and fixes' section:-

http://20v.org/problem.htm

............but if you have a look in the forum, I'm sure I have seen threads in the past that cover it:-

http://www.rennlist.org/scripts/lyris.pl?enter=audi20v