W12 sagging rear end

[bjam]

As ainarssems says, the other modules showing "supply voltage low" will be a low battery, but that won't be the cause of the suspension issue, which if the date is correct won't have worked since June?[/quote]

Its even longer than that,I have a feeling that date in June was when I read the codes with obdeleven and maybe cleared them at the same time obdeleven never came up with this code that vcds has done though,

Thanks everyone for all the replies so far,will have a look and update in next few days