Thanx for the advice. Whats the best diagnostics for me to purchase to do this?

I purchased a 2003 l322 a couple of months back and alls been well until yesterday. Whilst driving the suspension dropped on the offside, so I presumed a bag was leaking. I returned home, switched off and restarted all seemed ok again. (no faults showing). However today whilst driving the same...

Hi all. Purchased a 2003 l322 td6 2 months ago.