I'm having a few problems with my 1995 E280. It fails to start some days from cold unless I push the throttle slightly. Have replaced the fuel pump and ovp relay. It's losing coolant but this seems fairly intermittant too. There is a slight oil leak at the front of the engine around the area the top timing chain cover meets the bottom one. To top it all it appears my obd just doesn't work when I Push the button on my tester the led lights but fails to flash after I release the button. Have I bought a right dud that is going to cost me a fortune! Thought these were tough as old boots after my 1992 230E.