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1989 Mercedes-Benz S-Class oil type, capacity & maintenance
3.8L / 4.2L / 5.6L V8 (380SEL/420SEL/560SEL) or 3.0L turbo diesel (300SD) · RWDTypical for 1981–1991 · confirm in manual
All listed trims share these maintenance parts.
These are the typical specs for 1981–1991 models. Engine options varied, so confirm in your owner's manual or with a VIN fit check at checkout.
Your oil change shopping list
Everything for one DIY oil changeParts & fluids for the 1989 S-Class, by area of the car
Each part shows when it's due and who should do it: DIY · EasyDIY · ModerateMechanicDealer or specialist
EngineOil, filters, tune-up and belts11 items
Engine oilSAE 15W-40 or 20W-50 (temperature chart)W126 with filter. Look for API SF/SG on the label. Typical for 1981–1991 models with the 3.8L / 4.2L / 5.6L V8 (380SEL/420SEL/560SEL) or 3.0L turbo diesel (300SD). This engine has a flat-tappet camshaft: use an oil with extra zinc (ZDDP), such as a classic-car or high-mileage formula, or add a zinc additive.
WhenEvery 5,000 mi or every 6 months
DIY · EasyBuy on Amazon
Oil filterMatch by VINThe filter changed between engines in these years. Use the store's fit check with your VIN to get the right one.
WhenEvery oil change
DIY · EasyBuy on Amazon
Drain plugInspect, new gasketFit a new drain plug gasket or washer if yours is flattened or nicked.
WhenEvery oil change
DIY · EasyBuy on Amazon
Engine air filterFits 1989 S-ClassUsually a 5-minute job: unclip the airbox lid and swap the panel. Replace sooner on dusty roads.
WhenEvery 15,000 mi
DIY · EasyBuy on Amazon
Spark plugsFits 1989 S-ClassOn many V6, V8 and flat engines the rear plugs sit under the intake, so it's a shop job.
WhenEvery 30,000 mi
MechanicBuy on Amazon
Drive belts (V-belts)Fan, alternator & accessory belts, fits 1989 Mercedes-Benz S-ClassCheck the tension: about 1/2 inch of deflection midway between pulleys. Squealing on startup means it's loose or glazed.
WhenInspect every 12,000 mi; replace every 3–4 years or if cracked
DIY · ModerateBuy on Amazon
Distributor cap & rotorFits 1989 Mercedes-Benz S-ClassCracks or burned contacts cause misfires, especially in wet weather.
WhenEvery 30,000 mi
DIY · ModerateBuy on Amazon
Spark plug wiresFits 1989 Mercedes-Benz S-ClassReplace one wire at a time so the firing order stays right.
WhenEvery 30,000–50,000 mi, or if cracked
DIY · ModerateBuy on Amazon
Fuel filterFits 1989 Mercedes-Benz S-ClassOlder cars have a serviceable inline or carburetor-inlet filter. Relieve fuel pressure first on injected engines.
WhenEvery 30,000 mi
DIY · ModerateBuy on Amazon
PCV valveFits 1989 Mercedes-Benz S-ClassA cheap part that keeps crankcase pressure and oil leaks down.
WhenEvery 30,000 mi
DIY · EasyBuy on Amazon
Timing chainNo scheduled replacementA rattle on cold start can mean a worn chain or tensioner; have a mechanic check it.
WhenLasts the life of the engine with regular oil changes
Mechanic
BrakesPads, shoes, rotors and fluid3 items
Brake padsFront & rear sets, fits 1989 Mercedes-Benz S-ClassReplace when pads are down to about 3 mm, or if you hear squealing or grinding.
WhenInspect at every tire rotation; typically 30,000–70,000 mi
DIY · ModerateBuy on Amazon
Brake rotorsFront & rear, fits 1989 Mercedes-Benz S-ClassVibration in the pedal when braking usually means warped rotors.
WhenReplace with pads if below minimum thickness or warped
DIY · ModerateBuy on Amazon
Brake fluidDOT 3Brake fluid absorbs water over time, which lowers its boiling point. A shop flush takes about 30 minutes.
WhenEvery 2 years
MechanicBuy on Amazon
Cooling systemCoolant and hoses2 items
Engine coolantConventional green coolant, mixed 50/50Never mix coolant types. Top up only with the same type, and only when the engine is cold.
WhenEvery 2 years or 30,000 mi
MechanicBuy on Amazon
Radiator & heater hosesFits 1989 Mercedes-Benz S-ClassSqueeze them when the engine is cold. Spongy or cracked hoses should be replaced.
WhenInspect every 30,000 mi; replace if soft, swollen or leaking
MechanicBuy on Amazon
Transmission & drivetrainFluids for the gearbox and axles1 item
Transmission fluidDexronMany newer transmissions have no dipstick. A shop drain-and-fill is the safe route.
WhenEvery 25,000–30,000 mi, with a new pan filter
MechanicBuy on Amazon
Electrical & lightingBattery and bulbs2 items
BatteryGroup size per your car, fits 1989 Mercedes-Benz S-ClassMost parts stores test and install batteries for free.
WhenTest yearly after 3 years; most last 3–5 years
DIY · ModerateBuy on Amazon
Headlight & brake light bulbsFits 1989 Mercedes-Benz S-ClassCheck bulb sizes in your manual. LED headlights are usually a full-assembly repair.
WhenWhen one burns out (replace in pairs)
DIY · EasyBuy on Amazon
Steering, suspension & tiresRide, handling and tire life3 items
Tire rotationFront-to-rear swapMost tire shops rotate for free if you bought the tires there.
WhenEvery 7,500 mi
DIY · Moderate
Wheel alignment4-wheel alignmentIf the steering wheel is off-center or the car pulls, get it aligned.
WhenCheck yearly, or after hitting a big pothole
Mechanic
Shocks & strutsFits 1989 Mercedes-Benz S-ClassBouncing, nose-diving under braking or uneven tire wear are the signs.
WhenInspect at 50,000 mi; typically replaced at 75,000–100,000 mi
MechanicBuy on Amazon
Wipers & washerSee clearly2 items
Wiper bladesDriver & passenger, fits 1989 Mercedes-Benz S-ClassReplace when they streak, chatter or skip.
WhenEvery 6–12 months
DIY · EasyBuy on Amazon
Washer fluidAll-season or de-icerUse de-icer fluid in winter where it freezes.
WhenTop up as needed
DIY · EasyBuy on Amazon
Owner's manual for the 1989 Mercedes-Benz S-Class
Amazon fit lists aren't always perfect. Your owner's manual has the exact fluids, capacities and part specs for your car, so check it before you buy.
Printed owner's manual on Amazon →Original and reprint manuals for the 1989 Mercedes-Benz S-Class.Classic manuals at Faxon Auto Literature →Original and reprint literature for older cars.Mercedes-Benz's owner site (newer years only) →Free manuals there start around 2012, so your year may not be listed.
Every 5,000 miles: what's due
Pick your mileage to see what comes due at that service.
5,000 miles 1 item
- Oil & oil filter changeOr every 6 months · every 5,000 miShop part →
10,000 miles 2 items
- Oil & oil filter changeOr every 6 months · every 5,000 miShop part →
- Rotate & inspect tiresCheck brake wear while the wheels are off · every 7,500 mi
15,000 miles 3 items
- Oil & oil filter changeOr every 6 months · every 5,000 miShop part →
- Rotate & inspect tiresCheck brake wear while the wheels are off · every 7,500 mi
- Engine air filterAirbox or air cleaner on top of the engine · every 15,000 miShop part →
20,000 miles 1 item
- Oil & oil filter changeOr every 6 months · every 5,000 miShop part →
25,000 miles 2 items
- Oil & oil filter changeOr every 6 months · every 5,000 miShop part →
- Rotate & inspect tiresCheck brake wear while the wheels are off · every 7,500 mi
30,000 miles 7 items
- Oil & oil filter changeOr every 6 months · every 5,000 miShop part →
- Rotate & inspect tiresCheck brake wear while the wheels are off · every 7,500 mi
- Engine air filterAirbox or air cleaner on top of the engine · every 15,000 miShop part →
- Spark plugsPlus cap & rotor if it has a distributor · every 30,000 miShop part →
- Fuel filterInline or at the carburetor inlet · every 30,000 miShop part →
- PCV valveQuick and cheap · every 30,000 miShop part →
- Transmission fluid & filterDrain the pan, new filter and gasket · every 30,000 mi
35,000 miles 1 item
- Oil & oil filter changeOr every 6 months · every 5,000 miShop part →
40,000 miles 2 items
- Oil & oil filter changeOr every 6 months · every 5,000 miShop part →
- Rotate & inspect tiresCheck brake wear while the wheels are off · every 7,500 mi
45,000 miles 3 items
- Oil & oil filter changeOr every 6 months · every 5,000 miShop part →
- Rotate & inspect tiresCheck brake wear while the wheels are off · every 7,500 mi
- Engine air filterAirbox or air cleaner on top of the engine · every 15,000 miShop part →
50,000 miles 1 item
- Oil & oil filter changeOr every 6 months · every 5,000 miShop part →
55,000 miles 2 items
- Oil & oil filter changeOr every 6 months · every 5,000 miShop part →
- Rotate & inspect tiresCheck brake wear while the wheels are off · every 7,500 mi
60,000 miles 7 items
- Oil & oil filter changeOr every 6 months · every 5,000 miShop part →
- Rotate & inspect tiresCheck brake wear while the wheels are off · every 7,500 mi
- Engine air filterAirbox or air cleaner on top of the engine · every 15,000 miShop part →
- Spark plugsPlus cap & rotor if it has a distributor · every 30,000 miShop part →
- Fuel filterInline or at the carburetor inlet · every 30,000 miShop part →
- PCV valveQuick and cheap · every 30,000 miShop part →
- Transmission fluid & filterDrain the pan, new filter and gasket · every 30,000 mi
Other years: 1988 S-Class · 1990 S-Class · All S-Class years
Oil grade and capacity are checked against published lubricant application data where marked verified; part numbers and intervals follow Mercedes-Benz's maintenance schedule. Severe use (towing, short trips, dusty roads) shortens some intervals. Confirm the part number against your VIN at checkout. Read the full disclaimer
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