Description
Factory Mercedes 250 Workshop Manual (1976–1985)
This official factory-level repair manual covers every W123-platform Mercedes 250 built between 1976 and 1985, giving US-based technicians and home mechanics the same depth of service information used by authorized Mercedes-Benz dealer workshops.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | M123 2.5L inline-six |
| Diesel | N/A |
| Transmissions | 4-speed manual, 4-speed automatic |
| Drive | RWD |
| Model Years | 1976–1985 |
| Badge Twins | W123 platform shared with 230, 280, 300D series |
Common 250 Repairs Covered
| System | Procedures |
|---|---|
| M123 Engine | Timing chain tensioner inspection and replacement — a known wear item on high-mileage M123 units |
| Fuel System | Solex/Zenith carburetor rebuild, fuel pump testing, and idle mixture adjustment |
| Brake System | Front caliper overhaul, rear drum adjustment, brake booster diagnosis |
| Electrical | Wiring diagram tracing, instrument cluster repair, charging system fault diagnosis |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
What chassis and body styles are included in this manual?
The manual covers all W123-chassis Mercedes 250 variants produced from 1976 through 1985, including the standard-wheelbase sedan (W123) and coupe (C123) body styles. Both left-hand and right-hand drive configurations are documented.
Does this manual cover the same platform as the 280E or 300D?
Yes — the W123 platform underpins the entire 1976–1985 Mercedes E-Class predecessor lineup, including the 230, 280, 280E, and 300D. Much of the chassis, suspension, and body repair content applies across those models, though engine-specific sections are unique to the M123 2.5L inline-six found in the 250.
Are wiring diagrams included for all model years?
Yes. Full electrical diagrams covering engine management circuits, lighting, instrument cluster, charging system, and accessory wiring are included for the complete 1976–1985 production run, with wire color codes and connector pinout details.
What format is the manual?
This manual is delivered as a PDF document. After purchase you receive instant download access, and the file can be viewed on any Windows, Mac, Android, or iOS device with a PDF reader. Individual pages or full sections can be printed for bench use.
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