Only diesel engines have glow plugs. Instead of igniting the air/fuel mixture in the cylinders, this is burned. Consequently no spark is needed. Instead, the top of the glow plugs glow thereby increasing the temperature of the air/fuel mixture until the latter starts burning. Glow plugs therefore need to reach a temperature of 800°C though. Like spark plugs, glow plugs are powered by HT leads.
In general, the glow plugs of your Mercedes-Benz will need replacing every 50 000 miles. To ensure you order the right plugs for your Mercedes-Benz, we recommend you select the model and engine type of your car into the search engine.