W126
Mercedes-Benz S-Class (1981–1991)
Maintenance Schedule
9 recurring services keep the 1981–1991 Mercedes-Benz S-Class healthy — starting with oil changes every 3,000 miles. Budget roughly $4,300–6,600 in routine maintenance over 100,000 miles at typical U.S. shop prices.
Applies to model years 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991
Full schedule
Intervals follow the factory maintenance schedule for the 1981-1991 Mercedes-Benz S-Class. Cost ranges are typical U.S. shop prices.
| Service | Interval | Est. cost | Notes |
|---|---|---|---|
| Oil Change | Every 3,000 mi or 3 mo | $35–55 | Engine oil and filter replacement |
| Tune-up | Every 15,000 mi or 12 mo | $150–230 | Spark plugs, air filter, fuel filter |
| Brake Fluid | Every 24,000 mi or 2 yr | $60–85 | Brake fluid replacement |
| Power Steering | Every 30,000 mi or 3 yr | $80–120 | Power steering fluid replacement |
| Transmission Service | Every 50,000 mi or 4 yr | $180–260 | Transmission fluid replacement |
| Coolant Flush | Every 50,000 mi or 5 yr | $120–180 | Engine coolant replacement |
| Fuel System | Every 60,000 mi or 6 yr | $250–400 | Fuel injection system service |
| Differential Service | Every 60,000 mi or 6 yr | $150–220 | Rear differential fluid replacement |
| Timing Chain | Every 80,000 mi or 8 yr | $800–1,200 | Timing chain and tensioner replacement |
Common questions
How often should I change the oil on a 1981–1991 Mercedes-Benz S-Class?
Every 3,000 miles or 3 months, whichever comes first. A typical U.S. shop charges $35–55. Engine oil and filter replacement.
How much does it cost to maintain a Mercedes-Benz S-Class (1981–1991)?
Routine maintenance on the 1981–1991 Mercedes-Benz S-Class runs roughly $4,300–6,600 over 100,000 miles at typical U.S. shop prices, spread across 9 recurring services. Independent shops usually land near the low end; dealers near the high end.
What is the most expensive scheduled service on this S-Class?
Timing Chain at $800–1,200, due every 80,000 miles. Timing chain and tensioner replacement.
Cost ranges are estimates for typical U.S. independent shops and dealers; your local prices will vary. Always confirm intervals against your owner's manual — severe driving conditions (towing, short trips, extreme heat or cold) shorten many of them.