Description
Factory Mercedes 280 E Workshop Manual (1975–1985)
This official factory workshop manual delivers complete service and repair coverage for the Mercedes-Benz 280 E, giving US-based owners and technicians the same reference material used in authorized dealerships throughout the vehicle’s production run.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | M110 2.8L DOHC inline-six with Bosch K-Jetronic mechanical fuel injection (~177 hp) |
| Diesel | N/A |
| Transmissions | 4-speed automatic; 4-speed manual gearbox |
| Drive | RWD |
| Model Years | 1975–1985 |
| Badge Twins | Mercedes-Benz W123 platform (also underpins 230 E, 240 D, 300 D) |
Common 280 E Repairs Covered
| System | Procedures |
|---|---|
| Bosch K-Jetronic Fuel Injection | Warm-up regulator replacement, fuel distributor servicing, cold-start valve diagnosis — a frequent source of hard-start complaints on aged M110 engines |
| Cooling System | Thermostat replacement, radiator flush, water pump R&R, hose inspection and renewal |
| Front Suspension | Ball joint inspection, control arm bushing replacement, front wheel bearing adjustment — known wear items on high-mileage W123 chassis |
| Brake System | Front disc pad and rotor replacement, rear drum service, brake master cylinder overhaul, hydraulic circuit bleeding |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
Why does the Bosch K-Jetronic system on the M110 engine run rough when cold?
Cold-running issues on the 280 E are typically traced to the warm-up regulator, cold-start injector, or thermo-time switch. This manual covers full K-Jetronic diagnosis and component replacement, including fuel pressure specifications and injector flow testing procedures for the M110 engine.
Does this manual cover the full W123 platform or only the 280 E?
Coverage is specific to the 280 E (W123) produced between 1975 and 1985. The W123 platform was shared with other models such as the 230 E, 240 D, and 300 D, but powertrain procedures in this manual focus on the M110 2.8L inline-six and its associated fuel injection and ignition systems.
Are complete wiring diagrams included for the electrical system?
Yes. The manual contains full electrical schematics covering the K-Jetronic injection system, ignition circuit, lighting, instrument cluster, climate control, central locking, and power windows. Wire color codes, connector locations, and fault-finding flowcharts are all included.
What format is the manual?
The manual is delivered as a fully searchable PDF file. It downloads immediately after purchase and is compatible with Windows, Mac, Linux, iOS, and Android devices. Individual pages or complete sections can be printed as needed for bench use.
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