No worries Jonnyjeep, you don't know me or my experience so no offence taken - I would usually drain from the sump as well, just couldn't be bothered getting the ramps and extenders out! Maybe next time, I'm planning on changing the transmission oil at the next service, so it'll be worth the extra effort. You mention diagnostic software - is there anything easily available for the 300CRD? I've got a good code reader/scanner, but sometimes a laptop can delve a little deeper.