My father has been given a 1999 e300 but it won't start. The key puts on ignition and glow plugs but when you turn it to start nothing happens. I think it could be a relay or even gear selector sensor as it's automatic. AnyOne any idea where to start fault finding? Car turns over No problem when given power direct to starter motor but obviously doesn't fire as No fuel is commanded to be injected. Please tell me if I am talking rubbish!