Adjusting bonnet catches?

[munchkincoupe]

Hello

2005 A8 D3 3.0tdi Quatrro

I've had the bonnet open today and on closing it again the sensor is saying the bonnet is still open. The catch has caught and it is safely down but the drivers side is a couple of mm higher than the passenger side. If I press down on the drivers side the warning goes off. The catches seem to be working fine and I've WD40'd the mechanisms and given them a jiggle but still not going off.

Can anyone tell me how I adjust the catches to bring the drivers side down a couple of mm please?

Thanks