Mercedes-AMG Ignition coil replacement

The cost of ignition coil replacement on a Mercedes-AMG varies by model, engine size and parts quality. Use RepairFair's free estimator to get an accurate price for your specific car.

Each Mercedes-AMG model sits in a different vehicle segment (compact, mid-size, SUV) and has a different engine configuration. Larger, more complex or more premium vehicles require more expensive parts and sometimes more labour time. Select your specific model for an accurate estimate.

Ignition coil replacement on a Mercedes-AMG typically takes 0.5–1 hours of labour. In practice, most garages will complete the job within a half or full working day depending on their schedule.

A coil-on-plug ignition coil for most Mercedes-AMG models costs $20–$60 each from quality suppliers. The failed coil can be confirmed precisely by swapping it to a different cylinder and verifying the misfire code follows the coil — this takes minutes with a scan tool. Be cautious of a recommendation to replace all coils when only one has failed; unless the mileage is very high (100,000+ miles) and multiple coils are showing signs of degradation, replacing only the faulty coil is the appropriate repair. Replacing spark plugs alongside the failed coil is often worth the incremental cost if they are due.

An independent is the right choice for ignition coil replacement on most Mercedes-AMG models. The repair is straightforward — remove the old coil, plug in the new one, clear the code, and road test. No Mercedes-AMG-specific software is needed. Quality aftermarket coils are widely available at a fraction of OEM price. Dealers charge dealer-rate labour for a 15–30 minute job; an independent completes the same repair at a fraction of the cost.

Yes — quality aftermarket ignition coils are appropriate for most Mercedes-AMG models. Bosch, Denso, Delphi, NGK and Beru manufacture coils that match OEM output voltage and dwell angle specifications. Some Mercedes-AMG engines (particularly VAG turbocharged 4-cylinders and certain BMW 6-cylinder engines) are known for coil failures — in these cases, the aftermarket equivalent from Beru or Bosch is often preferred because it uses updated insulation that is more heat-resistant than the OEM coil that failed. Avoid very cheap unbranded coils — incorrect internal resistance or insufficient output voltage causes persistent misfires even on a new coil.

Both cause engine misfires — rough idle, poor acceleration and a check engine light. The key difference is in the fault code pattern. A faulty coil typically shows a specific cylinder misfire (P0301–P0308) that follows the coil when it is swapped to another position. Worn spark plugs also cause misfires, but the misfire tends to be more random or spread across multiple cylinders, and the plug condition (gap, electrode wear, carbon deposits) is visible on inspection. Since the fault code alone cannot always distinguish the two, a coil-swap test followed by plug inspection is the correct diagnostic approach before ordering parts.

At 0.5–1 hours of labour this is a relatively straightforward repair. A competent home mechanic with the right tools could attempt it, but a professional will road-test the car and inspect surrounding components to make sure everything is in order.