A4 control arm squeaks are common. After working with five or more I
would be willing to bet that the problem is not at the frame end of the
arms it is due to dried out ball joints.

You can fix by using a grease needle adapter to inject white lithium
into the rubber boots. It will take 3 or 4 days to work in and then will
probably stay fine for at least two years.

Matt wrote:
> A few months ago I noticed a loud squeaking noise (dry joint?)coming from
> the drivers side front wheel, which drove me mad.
>
> In a fit of pique I liberally sprayed WD40 and the squeak disappeared!
>
> It's now back and I don't want to use WD40 again as it will perish the
> rubbers.
>
> Cananyone suggest a different solution?
>
> TIA
> Matt
>
>