WARNING

Diesel cars have a new system called Auto Blue. You must add fuel and autoblue too. I saw the warning signs on my dash, but had no idea what they were. I thought it's due a service, they will do the job.
It's a fuel add, next to the fuel cap. If you ignore, do it at your peril. The car will not start without it in your system. Mine took 15lt to get it going again. The main dealership should have told me really.

Keep an eye on it.