Description
Factory Mercedes 260SE Workshop Manual (1986–1991)
This official factory-level repair manual covers the W126-chassis Mercedes-Benz 260SE, giving US technicians and owners complete service data for one of Mercedes’ most celebrated flagship sedans of the late 1980s.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | M103 2.6L SOHC Inline-6 (Bosch KE-Jetronic fuel injection, ~160–177 hp) |
| Diesel | N/A |
| Transmissions | 4-speed automatic; manual transmission variants |
| Drive | RWD (LHD and RHD configurations) |
| Model Years | 1986–1991 |
| Badge Twins | Mercedes-Benz W126 S-Class series (260SE, 300SE, 420SEL, 560SEL share platform) |
Common 260SE Repairs Covered
| System | Procedures |
|---|---|
| M103 Timing Chain | Timing chain and guide rail replacement — a known wear item on the M103 engine |
| KE-Jetronic Fuel Injection | Fuel distributor, warm-up regulator, and injector service; hard-start and idle diagnostics |
| Cooling System | Radiator, thermostat, water pump replacement; overheating diagnosis |
| Suspension & Steering | Front and rear suspension rebuild, steering box adjustment, ball joint replacement |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
What is the W126 chassis, and does this manual cover all its variants?
The W126 is Mercedes-Benz’s second-generation S-Class platform produced from 1979 to 1991. This manual is specifically tailored to the 260SE, the entry-level inline-6 member of the late W126 lineup sold from 1986 to 1991. While other W126 variants such as the 300SE, 420SEL, and 560SEL share the same platform, engine and fuel system procedures in this manual are specific to the M103 2.6L engine found in the 260SE.
Does the manual address the M103 timing chain issue?
Yes. The M103 engine’s timing chain and plastic guide rails are a well-documented wear concern on the 260SE. The manual provides complete step-by-step disassembly, inspection, and replacement procedures including torque specifications and special tooling requirements to perform the job correctly.
Are Bosch KE-Jetronic fuel injection wiring diagrams included?
Absolutely. The electrical section contains full wiring schematics for the Bosch KE-Jetronic continuous injection system, including the electro-hydraulic actuator circuit, oxygen sensor feedback wiring, cold-start injector, and warm-up regulator. Connector pinouts, wire color codes, and ground locations are all documented.
What format is the manual?
This manual is delivered as a PDF file. After purchase you receive an instant download link and unlimited lifetime re-downloads. The file is fully searchable and compatible with Windows, Mac, tablets, and smartphones. Individual pages or entire sections can be printed for workshop use.
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