Engine diagrams. For the diesel 1.9 S40 51 plate. Are there any which will indicate what is sticking on where and what is is for. ie I have some plugs with wires which it would be handy to know what they read and send to as well as just knowing more in general. It is also not so obvious which engine exactly so that despite reading the badge I could be persuaded to different types. A good diagram will help match things if the diesel for a start which I imagine is significantly different to the petrol for attached parts.