I recently purchased a 84 300SD which I intend to convert to WVO. I've driven it about 200km and it runs fine once warm, but now that outside temp is down to 10 degrees C (52 F) up here in Ontario Canada, it starts harder and will stall after running for about 10 sec. Then it's hard to start the 2nd or 3rd time. Could it be poor injector spray? Valves needing adjusting? Low compression? I haven't checked these yet, but would like to tackle myself. I could use some basics hints where to start since I'm relatively new to diesels, particularly Mercedes. The engine also seems to "knock/rattle" a little more than I would expect when cold, but it totally quiets down when warm. Would love to hear any helpful suggestions?