Mercedes-Benz SLK Maintenance Plans

The Mercedes-Benz SLK spans several generations from 1996 to 2016, with maintenance needs that vary by model year, engine and fuel type. Use the generation and engine selectors to view the correct service schedule for your SLK.

Select your Mercedes-Benz model below to view the online service schedule for your specific engine.

3 models covered

Model	Year Range	Engines covered	Fuel
SLK 1996-2004	1996-2004	200 Kompressor, -LPG LPG,Petrol (111.958), 230 Kompressor, -LPG LPG,Petrol (111.983), 32 AMG Kompressor Petrol (112.960), 320, -LPG LPG,Petrol (112.947)	LPG, Petrol
SLK 2004-2010	2004-2010	200 Kompressor, -LPG LPG,Petrol (271.944), 200 Kompressor, -LPG LPG,Petrol (271.954), 280, -LPG LPG,Petrol (272.942), 350 Petrol (272.969), 350, -LPG LPG,Petrol (272.963), 55 AMG Petrol (113.989), 55 AMG Petrol (113.989)	LPG, Petrol
SLK 2011-2016	2011-2016	200 Petrol (274.920), 250 BlueEFF Petrol (271.861), 250 CDI Diesel (651.980), 300 Petrol (274.920), 350 BlueEFF Petrol (276.956), 55 AMG Petrol (152.980)	Diesel, Petrol

Servicing by engine type

Petrol SLK maintenance considerations

Petrol Mercedes-Benz SLK engines range from Kompressor units (such as M111 and M271) through to naturally aspirated V6s (M112 and M272) and later turbo petrol variants (M274), plus AMG applications (including M113 and M152). Oil service intervals can vary significantly across these generations, so use the schedule for your exact engine and driving profile. Pay close attention to air filtration, spark plugs and ignition components, as misfires can be more noticeable under load on supercharged and high-output variants. Cooling system condition and correct coolant specification matter across the range, especially on older cars where hoses, radiator and thermostat ageing can affect running temperature stability.

Diesel SLK maintenance considerations

Diesel SLK models in this family are represented by the 250 CDI using the OM651 engine. For diesel servicing, oil and filter condition is critical because it supports turbocharger life and helps manage soot loading in the intake and emissions systems. Ensure the correct fuel filter replacement cadence is followed for your selected year and engine, as poor filtration can lead to starting issues and reduced performance. If your SLK is used for short trips, it may need closer attention to intake and emissions-related components than an equivalent car doing longer motorway runs.

LPG SLK maintenance considerations

Some Mercedes-Benz SLK petrol models are shown with LPG fitment, including Kompressor and V6 petrol engines such as M111, M271, M112 and M272. LPG systems add extra service items beyond standard petrol maintenance, so check both the vehicle service schedule and the LPG system requirements for filters, pipework and leak checks. Engine tune condition is especially important on LPG conversions, as worn plugs, leads/coils or vacuum leaks can cause hesitation and backfiring. Also keep an eye on valve-train related symptoms on higher-mileage engines, as correct mixture and ignition health reduce thermal stress when running on gas.

Common service operations for Mercedes-Benz

The operations listed below reflect typical scheduled servicing for the Mercedes-Benz SLK, but the exact items and cadence depend on the specific generation and engine. Where intervals vary widely, follow the values shown for your selected SLK variant.

Operation	Typical interval	Notes
Oil and filter change	See selector above	Varies by engine and recommended oil grade
Air filter	30,000 to 60,000 km	More often in urban or dusty driving
Cabin filter	15,000 to 30,000 km or 1 year	Affects air conditioning and air quality
Brake fluid	2 years (all models)	Regardless of mileage
Coolant	Per manufacturer (typically 5 years or 100,000 km)	Check level and condition (colour, deposits) at every service
Front brake pads	Depending on use (typically 30,000 to 60,000 km)	Wear depends on driving style and load carried
Timing belt	See selector above	Interval varies widely by engine
Spark plugs (petrol)	30,000 to 60,000 km	Petrol engines only

Mercedes-Benz electronic diagnostics

If a warning light appears or the SLK develops running issues between services, an OBD scan can quickly point you in the right direction. Our fault-code information page at /pages/fault-codes-obd-car-mercedes_benz-slk helps you interpret common powertrain (P), chassis (C), body (B) and network (U) code groups. Use the codes to guide checks, then confirm the root cause with basic tests such as battery/charging verification, vacuum and boost leak inspection, and sensor live-data review.