NGK Genuine Ignition Coil U5117-48337

NGK Genuine Ignition Coil U5117‑48337

The NGK Genuine Ignition Coil U5117‑48337 is a high‑performance ignition component designed to deliver reliable spark generation for a wide range of Mercedes‑Benz vehicles. Manufactured by NGK, a leader in automotive ignition technology, this coil offers superior durability, precise timing, and consistent performance under demanding operating conditions.

Key Features

• OEM Quality: Identical to the original equipment specification used by Mercedes‑Benz during vehicle production. Guarantees seamless integration with factory wiring harnesses and control modules.
• Robust Construction: Built with a high‑grade copper winding, reinforced epoxy insulation, and a heat‑resistant housing that withstands temperatures up to 250 °C.
• Compact Design: The coil’s dimensions are engineered to fit the tight engine bay spaces typical of Mercedes‑Benz models such as C‑Class, E‑Class, S‑Class, and SLK.
• High Spark Energy: Generates a strong spark capable of igniting high‑compression gasoline engines efficiently, improving combustion stability and reducing misfires.
• Long Life Span: Designed for extended service life, often exceeding the lifespan of standard aftermarket coils by up to 30 % under normal driving conditions.

The U5117‑48337 coil is engineered to fit a broad spectrum of Mercedes‑Benz models. Below is an organized list of compatible vehicle families and model years:

For a complete list of specific part numbers and engine codes, consult the NGK technical data sheet or contact an authorized dealer.

1. Disconnect Battery: Ensure the vehicle’s battery is disconnected to prevent accidental electrical discharge.
2. Remove Old Coil: Locate the existing ignition coil on the engine block. Carefully detach the high‑voltage leads and remove any mounting screws or brackets.
3. Prepare New Coil: Verify that the new U5117‑48337 matches the original part number for your vehicle. Inspect the coil for any visible damage before installation.
4. Mount Coil: Place the new coil onto the engine block, aligning it with the mounting points. Secure it using the supplied screws or brackets.
5. Reconnect Leads: Attach the high‑voltage leads to the appropriate terminals on the coil and ensure a firm connection.
6. Recheck Alignment: Verify that all connections are tight and that the coil is positioned correctly relative to the spark plug.
7. Reconnect Battery & Test: Reconnect the battery, start the engine, and observe for smooth operation. Check for any misfire codes using an OBD‑II scanner.

• Improved Fuel Efficiency: A consistent spark reduces fuel consumption by ensuring complete combustion.
• Reduced Emissions: Efficient ignition leads to lower unburnt hydrocarbons and CO₂ output.
• Enhanced Engine Responsiveness: Quick spark delivery improves throttle response, especially under high load conditions.
• Reliability Under Stress: The coil’s robust construction resists vibration and heat, maintaining performance in hot climates or during extended driving sessions.

• Inspect the coil regularly for signs of wear, such as cracked insulation or loose connections.
• Avoid exposing the coil to excessive moisture; use a protective cover if operating in wet environments.
• If the engine exhibits misfires or rough idle, consider testing the coil with a multimeter or swapping it with a known good unit for diagnosis.

The NGK Genuine Ignition Coil U5117‑48337 delivers OEM reliability and performance across a wide array of Mercedes‑Benz vehicles. Its durable construction, precise spark generation, and compatibility with numerous engine models make it an ideal choice for enthusiasts and technicians seeking to maintain or restore the original driving experience.