Well I'm just going on what I've learned here, but you need compression, fuel, battery/starter, and glow plugs all working together to get the car to start. You should list what car you are talking about and you should turn off your caps lock. You can do searches on those areas that need to be checked for more detailed information.

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RT


1984 300D---Sold
1995 E420 - 106K - Brilliant Silver Metallic/Orion Gray --- Sold
1984 300SD - 151K Manganese Brown Metallic/Mostly Black --- Sold
1982 240D - 79K - Manila Beige/Palomino---Sold