What does the distributor cap and rotor look like for your Mercedes 1990 300E?

The distributor cap for a 1990 Mercedes 300E is typically a black, round plastic component with several terminal posts around the edge for spark plug wire connections. The rotor, which fits inside the cap, is a small, flat piece that spins to direct electrical current to the appropriate terminal. Both parts are crucial for the ignition system, ensuring proper spark distribution. When inspecting, look for signs of wear, such as cracks or corrosion on the terminals.