Hi. My name is Barry Dormehl. I have a Mercedes 1995 model C180. Wont start. Spark is ok. Only injects once on nr.2 and 3 while crancking the engine. Nothing more. Then switch off. When you try directly after that nothing happens. If you wait for half a minute then try again and nr. 2 and 3 injects once while crancking the engine. Nothing more. What could be the problem? Thank you.