Description
Factory Mercedes S Class 400SE / 400SEL Workshop Manual (1992–1999)
This official factory-level service manual delivers complete repair and maintenance coverage for the W140-platform Mercedes S Class 400SE and 400SEL — the flagship luxury sedans that defined Mercedes engineering in the 1990s US market.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | M119 4.2L DOHC V8 (~275 hp) |
| Diesel | N/A |
| Transmissions | 4-speed automatic (all variants) |
| Drive | RWD |
| Model Years | 1992–1999 |
| Badge Twins | W140 platform; 400SE (standard wheelbase), 400SEL (long wheelbase) |
Common S Class 400SE / 400SEL Repairs Covered
| System | Procedures |
|---|---|
| M119 Timing Chain | Timing chain guide replacement, tensioner service, chain stretch diagnosis |
| Air Suspension (ABC) | Hydraulic strut replacement, accumulator service, pump diagnostics and fluid flush |
| Automatic Transmission | Valve body rebuild, torque converter inspection, fluid and filter service |
| Electrical / Central Locking | Central locking vacuum pump replacement, wiring harness inspection, power window regulator repair |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
What is the W140 chassis, and does this manual cover both wheelbase lengths?
The W140 is the internal chassis designation for the 1991–1999 Mercedes S Class. This manual covers both the standard-wheelbase 400SE and the long-wheelbase 400SEL in full. All model-year variations from 1992 through 1999 are included, along with regional specification differences.
Does the manual cover the M119 timing chain — a known weak point on these engines?
Yes. The M119 4.2L V8 is well documented for timing chain guide wear over high mileage. The manual includes full procedures for chain guide inspection and replacement, tensioner servicing, and camshaft timing verification to restore correct engine operation.
Is the air suspension / hydraulic ABC system covered in detail?
Yes. The W140’s hydraulic active body control and air suspension components are covered, including strut replacement, accumulator servicing, pump diagnostics, pressure testing, and complete fluid flush procedures.
What format is the manual?
This manual is a PDF document. After purchase you receive an instant download link. Files can be viewed on any Windows, Mac, tablet, or smartphone device, and individual pages or sections can be printed for use in the workshop. Your download remains available for life.
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