Spark plugs and glow plugs are small but essential parts of your Mercedes-Benz engine system. They play distinct roles depending on whether your vehicle runs on gasoline or diesel.

What's the Difference Between Spark Plugs and Glow Plugs?

Spark plugs ignite the fuel-air mixture in gasoline engines, while glow plugs preheat the combustion chamber in diesel engines to aid ignition. While used synonymously, they are distinct and cannot be used interchangeably.

Easy Steps to Replace Spark Plugs in Your Mercedes-Benz

1. Disconnect the Battery

Always disconnect the negative terminal before starting work.

2. Remove Ignition Coils

Carefully detach ignition coils to gain access to the plugs.

3. Unscrew Old Spark Plugs

Use the proper socket tool to remove worn plugs.

4. Check Gap on New Plugs

Ensure the new plugs are properly gapped for your Mercedes-Benz CLA-Class or your exact model.

5. Install and Torque Correctly

Install the plugs snugly and torque them to factory specifications.

Why Shop at Mercedes OE Parts?

We provide factory-grade spark plugs, glow plugs, and related essentials like oil filters to maintain top performance in your Mercedes-Benz. Get access to exclusive online deals and specials when you shop here.

For expert support with your order, contact our team today.