ME Super exposure compensation fault

One of my ME Supers has a bizarre fault where it occasionally underexposes by two stops. Weirdly if I wiggle the exposure compensation dial this clears, so I'm guessing it's due to dirty contacts (given the thing reeked of tobacco smoke when I got it I'm not entirely surprised).

So, obviously, I'm working out where the contacts are with a view to squirting some cleaning fluid in there and working the mechanism to scrub the dirt out. Does the ME S use the same variable resistor for exposure compensation and film speed setting (as the MV1 and other simpler M series do)? Or is it somewhere deeper in the mechanism?

This is a potential weakness and a good wiggling, a really great technical term , can do the trick.

Have a look at this DM LINK It may be of use.

Thanks HG - I'm going to try to avoid taking too much off as that tends to increase my chances of getting it back together!

I don't see much point in getting it professionally repaired as I only paid £28 for it and the 50/1.7 is very nice indeed, so if I can't sort it the lens was worth the purchase price. Given it seems mechanically sound and the shutter speeds appear accurate I'd quite like to fix this electrical gremlin. The camera has been sitting in my flight case for about a year now, since I found the fault and have only just got around to fixing it!