I have a 110 TDI, just bought it recently. Thought my maf was playing up as i was having really bad power problems and power was kicking in and out intermitantly when i put my foot down. Was facing up to the fact i was gonna have to fork out for a new maf.
I pulled the maf connector off last night to have a look but didn't apply any grease, stuck it back on and performance seemed a bit better by just doing that -
I got some grease from maplin today, applied it this avo and just taken it for a run straight after. It's totally worked!!

Runs a lot smoother, the power is constant right through (well certainly in 2nd and 3rd-only just nipped it round town). I happy now that I haven't bought a duff car. Time will tell i guess if it's a permanent fix.
Cheers guys!