TPMS sensors and valves

[Stuarta]

Can anyone pls confirm which sensor valves are the correct ones to order for a 2005 W12?

I need to replace the sensors but the local stealer wants around 160GBP EACH for them - can get them online for a third of that but want to order valves too as the incompetents here will more than likely break the old ones removing them and they only cost a few quid - just need to get the right ones.

Rockauto have 4 different varieties with different length stems http://www.rockauto.com/catalog/x,ca...parttype,12993 but obviously I can't check that without removing the tyres and the old ones which renders the car useless - anyone have the info?

Thanks, as always.