| Cause of malfunction | Method of elimination |
| No spark. Distributor cap is wet and dirty | Clean and dry the distributor cap, spray the inside with a special compound |
| Cracks on the distributor cap, burnt channels | Replace the distributor cap |
| The carbon contact in the distributor cap is worn out | Replace carbon contact |
| Defective distributor rotor | Replace the distributor rotor |
| Distributor rotor resistance too high | Replace the distributor rotor |
| The spark plugs are connected in the wrong order | Connect the plugs according to the firing order |
| The spark plugs are wet due to many attempts to start (flooded) | Turn the candles inside out and dry them |
| The candles are damp and dirty on the outside | Clean and dry the candles, put the silicone protective cover on the candle and cap |
| Ignition coil power is too low | Check the electrical connections on the ignition coil for tightness and good contact |
| Ignition coil with cracks and burnt areas | Replace the ignition coil |
| Voltage loss due to electrical contacts or wires coming into contact with the motor | Install the wires correctly |
| The ignition timing is not set accurately | Adjust ignition timing |
[Article was borrowed from the website: www.MercedesMan.ru]