this is lifted off another forum, but it worked on mine
You will need:
1 x philips screw-driver (pref. a short one!)
1 x copper grease or WD-40 or lubricant of some kind ( i don't think it really matters)
1. Locate the screw on the lower section of the steering wheel housing. Undo and remove.
2. **Locate the screw on the upper section of the steering wheel housing. Undo and remove.
3. Un-clip the upper and lower housing from each other. The housing is simply 'clipped' together. I prised mine apart from the rear first by pulling down on the lower section, it needed some gentle force. Came apart fine after that. There are also 'clips' on the housing where the screws were, these can come out of the housing. Just pulling the housing off will free these up. They need to be re-inserted when putting the screw's back in!
Tip: Don't lose the rubber ring around the igintion barrel, this should come loose when you pull apart the housing.
4. **Remove housing completely. Might be a bit fiddly getting the top bit off without steering wheel height adjustment? Not sure. Mine came out ok by pushing the housing backwards and upwards! (see added edit below!)
5. Now, looking at the rear of the steering wheel from below, there is a white block with a metal contact on that 'just' touchs the back of the steering wheel hub (think its the hub?). This was the b!tch that was squeaking on my car.
6. Lube it up. Turn the wheel a few times and hey presto, no squeaks! This may not be the case in your car, something else may be squeaking! If so, investigate or just spray WD-40 everywhere. I am not responsible for any damage you do
7. Put it all back together. Getting the rubber ring lined up with the barrel and housing was the most difficult bit. Don't forget to tuck-in the rubber guards that are on the indicator / wiper levers!
hope this helps