Description
Factory Mercedes 500SE / 500SEL / 500SEC Workshop Manual (1986-1991)
Complete factory-level service and repair documentation for the Mercedes-Benz W126 V8 range, covering every procedure a US-market technician or dedicated owner needs to maintain and restore these classic sedans and coupes.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | M117 5.0L V8 with Bosch KE-Jetronic fuel injection (~231-245 hp) |
| Diesel | N/A |
| Transmissions | 4-speed automatic |
| Drive | RWD |
| Model Years | 1986-1991 |
| Badge Twins | N/A – W126 platform exclusive to Mercedes-Benz |
Common 500SE / 500SEL / 500SEC Repairs Covered
| System | Procedures |
|---|---|
| M117 Timing Chain | Timing chain and guide rail replacement – known wear item on high-mileage M117 engines |
| KE-Jetronic Fuel Injection | Fuel distributor service, warm-up regulator testing, cold-start valve replacement |
| Self-Leveling Suspension | Rear hydraulic self-leveling strut service and fluid system bleeding |
| Climate Control | Automatic climate control actuator diagnosis, blower motor replacement, and refrigerant system service |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
Why does the M117 timing chain need attention on W126 V8s?
The M117 5.0L V8 uses plastic-tipped timing chain guides that become brittle with age and heat cycling. At high mileage, guide rail fragments can shed into the oil pan and cause tensioner failures. This manual provides the complete procedure for inspecting, removing, and replacing the timing chain, tensioner, and all guide rails – a critical preventive job on any W126 with over 100,000 miles.
What is the difference between the 500SE, 500SEL, and 500SEC?
All three ride on the W126 platform with the same M117 V8 drivetrain. The 500SE is the standard-wheelbase four-door sedan, the 500SEL adds approximately 3.9 inches to the rear wheelbase for increased legroom, and the 500SEC is the two-door pillarless coupe variant. This manual covers all three body styles since they share mechanical systems, wiring architecture, and service specifications.
Does the manual cover the KE-Jetronic fuel injection system in detail?
Yes. Full Bosch KE-Jetronic coverage is included, encompassing the fuel distributor, electro-hydraulic pressure actuator (EHA), warm-up regulator, airflow sensor plate, cold-start injector, and all associated fuel delivery components. Diagnostic procedures, pressure test specifications, and component replacement steps are all documented.
What format is the manual?
This is a PDF manual. After purchase you receive an instant download link. The file is fully searchable and can be viewed on any Windows or Mac computer, tablet, or smartphone. Individual pages or sections can be printed as needed for workshop use.
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