Change Car Spark Plugs Mercedes-Benz SL

Change Car Spark Plugs

Easy 0h30–6h00 ~50–600£
Estimated time 0h30–6h00
Estimated labour cost ~50–600£
Difficulty Easy

What is the role of Mercedes-Benz SL spark plugs?

The spark plug generates a spark at the precise moment needed to ignite the air/fuel mixture in the combustion chamber of petrol (or LPG) engines. The engine management system controls ignition timing.

When should you change your Mercedes-Benz SL spark plugs?

Manufacturers provide replacement recommendations; refer to your vehicle maintenance booklet. Generally replace every 60,000 km (45,000 km for severe use). Some vehicles with long-life plugs (titanium, platinum, iridium) can go 100,000–150,000 km.

How do I know if I need to change my Mercedes-Benz SL spark plugs?

Via the EOBD system (mandatory since 2001 on petrol cars), faulty spark plugs will trigger fault codes, typically P0301–P0304 (misfire, cylinders 1–4). Symptoms include: difficulty starting, misfires, reduced engine power, increased fuel consumption.

Is it difficult to change Mercedes-Benz SL spark plugs?

Difficulty level 2/5: technically easy but requires specific tools (spark plug wrench, torque wrench). Key points: wait for cold engine, clean plug well with compressed air before removal, never use a dropped plug, do not grease threads, hand-tighten then torque to specification.

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View your SL maintenance plan (keep the SL token) →

3 models covered

Model Year Range Engines covered Fuel
SL 1989-2001 1989-2001 300 SL Petrol (103.984), 300 SL-24 Petrol (104.981) Petrol
SL 2001-2012 2001-2012 300 Petrol (272.949), 350 Petrol (272.966), 350 Petrol (272.968), 350, -LPG LPG,Petrol (112.973), 500, -LPG LPG,Petrol (113.963), 500/550 Petrol (273.965), 55 AMG EVO Petrol (113.995), 55 AMG Kompressor Petrol (113.992), 55 AMG Petrol (113.992), 600 Petrol (275.951), 600 Petrol … LPG, Petrol
SL 2012-2020 2012-2020 350 BlueEFF Petrol (276.954), 400 Petrol (276.825), 400/450 Petrol (276.825), 500/550 BlueEFF Petrol (278.927), 63 AMG Petrol (157.983), 63 AMG Petrol (157.983), 65 AMG V12 Petrol (279.981) Petrol

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