HELP! Speedo Cluster / Air Con

[texas_pete]

Hi all.
Managed to save up and treat ourselves to an X5. Always wanted one and i'm not dissaponted.

I do have a couple of problems, i need some help with though.

1. The display is cursed by the dreaded pixel failure. So I've got a set from ebay, in great condition.
Just fitted them and the display works perfect. Problem is, the abs lights and a hazard in the middle stay illuminated. Also, the computer under the radio doesn't work?
The new cluster is from an X5 diesel, same as mine but a 2006 where as mine is 2003.
It all plugs in fine and the dials all work as they should, just these warning lights.
Is there a setting to change?
I've changed the standard business head unit for an after market SatNav unit so not using the fuel computer part any more.

2. When i got the X5, the air con wasn't working. After digging about, i found that the plug had come out that powers the electric clutch. Its been working great for the last few weeks but has now stopped.
I've used a tester and there is power going to the plug.
I've used a live feed to try and force it on but it seems the clutch just wont engage.
Question is: can the clutch pulley be swapped whilst the pump stays on the car? I could swap the pump but then id have to have it re-gassed.
Its a 3.0d and the aircon pump is buried! Any one done it, or can advise?

Thanks in advance for any help.