Segment Positioning:
Luxury and Executive Sedans, Coupes, Convertibles, and SUVs. These models represented Mercedes-Benz's core offerings for discerning buyers seeking comfort, engineering, and longevity.
Key Competitors:
BMW (5-Series, 7-Series, 3-Series), Audi (100/200, V8), Jaguar (XJ), Volvo (700/900 series), Cadillac (DeVille, Seville), Lincoln (Town Car, Continental), Land Rover (Range Rover for W463).
Engineering Philosophy:
Built to last, exceptional build quality, advanced engineering for the era, focus on driver comfort and safety, sophisticated ride and handling.
Engine Systems:
M102, M103, M104, M110, M116, M117, M119 gasoline engines; OM601, OM602, OM603 diesel engines. Includes fuel injection, ignition, cooling, lubrication, emissions control, and performance tuning.
Transmission Systems:
4-speed and 5-speed automatic transmissions (e.g., 722.3, 722.4, 722.5, 722.6 pre-production for later models), 4-speed and 5-speed manual transmissions (e.g., G3/30, G4/30, G5/36). Covers overhaul, adjustments, and fluid services.
Drivetrain Systems:
Rear-wheel drive (RWD) and 4MATIC all-wheel drive (for W124 and W463). Includes differential, driveshafts, CV joints, and hub assemblies.
Suspension And Steering:
Independent front and rear suspensions (e.g., McPherson strut, multi-link), hydraulic power steering systems, self-leveling suspension (SLS) on certain models. Covers component replacement, alignment specifications, and troubleshooting.
Brake Systems:
Disc brakes (front and rear), ABS (Anti-lock Braking System) on later models. Includes pad/rotor replacement, caliper overhaul, fluid flush and bleed, and ABS component diagnosis.
Electrical Systems:
Comprehensive wiring diagrams, component locations, fuse/relay assignments, starter, alternator, battery, lighting, HVAC controls, power accessories (windows, seats, mirrors), and diagnostics for basic electronic control units (ECUs).
Body And Interior:
Body panel removal/installation, door mechanisms, interior trim, upholstery, climate control system (HVAC), and basic body repair procedures.
Routine Maintenance:
Oil and filter changes, air filter replacement, fuel filter replacement, spark plug replacement, coolant flushes, brake fluid changes, transmission fluid and filter services, differential fluid changes.
Major Repairs:
Engine overhauls, transmission rebuilds, suspension component replacement (shocks, struts, ball joints, bushings), steering rack replacement, brake caliper/rotor replacement, exhaust system repairs, fuel pump replacement, radiator replacement.
Troubleshooting:
Diagnostic flowcharts for common issues, pinpoint testing procedures for electrical faults, symptom-based troubleshooting guides.
Diagnostics:
OBD-I diagnostic codes (where applicable), manual diagnostic procedures for engine control, ABS, and other systems.
Depth Of Information:
Detailed step-by-step repair instructions, torque specifications, special tool requirements, diagnostic charts, and factory tolerances. Suitable for professional technicians and advanced DIYers.
File Format Details:
Likely PDF with searchable text, bookmark navigation, and high-resolution diagrams.
Print Quality Description:
Professionally formatted with clear text and high-quality, reproducible diagrams and illustrations.
Binding Type Description:
If printed, likely spiral-bound for lay-flat use or robust perfect binding for durability.
Paper Type Description:
If printed, expect heavy-duty paper stock suitable for workshop environments.
W124 Engines:
2.0L I4 (M102), 2.3L I4 (M102), 2.6L I6 (M103), 3.0L I6 (M103), 3.2L I6 (M104), 3.0L Turbo Diesel I5 (OM603), 2.5L Diesel I5 (OM602).
W126 Engines:
2.8L I6 (M110), 3.8L V8 (M116), 4.2L V8 (M116), 5.0L V8 (M117), 5.6L V8 (M117).
R107 Engines:
3.8L V8 (M116), 4.5L V8 (M117), 5.0L V8 (M117), 5.6L V8 (M117).
W463 Engines:
2.3L I4 (M102), 2.6L I6 (M103), 3.0L I6 (M103), 3.2L I6 (M104), 4.2L V8 (M116), 5.0L V8 (M117), 2.5L Diesel I5 (OM602), 3.0L Turbo Diesel I5 (OM603).
Horsepower Range:
Approximately 100 hp (diesel) to 260 hp (later V8s).
Torque Range:
Approximately 150 lb-ft (diesel) to over 300 lb-ft (V8s).
Fuel Delivery:
Bosch K-Jetronic (CIS), KE-Jetronic (CIS-E), and later electronic fuel injection (EFI) systems.
W124 Standard Transmission:
4-speed manual (early models), 4-speed automatic (common).
W126 R107 Standard Transmission:
4-speed automatic (common).
W124 Optional Transmission:
5-speed manual (later models), 5-speed automatic (e.g., 722.4, 722.5).
W126 R107 Optional Transmission:
5-speed manual (rare on some models).
Automatic Transmission Features:
Hydraulic converter lock-up, sport/economy modes on some models.
W124 Sedan Dimensions:
Length: ~188 in, Width: ~69 in, Height: ~56 in.
W126 Sedan Dimensions:
Length: ~197-201 in, Width: ~71 in, Height: ~57 in.
R107 Coupe Dimensions:
Length: ~176 in, Width: ~69 in, Height: ~51 in.
W463 Dimensions:
Length: ~178-185 in, Width: ~71 in, Height: ~77 in.
Curb Weight Range:
Approximately 3300 lbs to 4500 lbs depending on model and configuration.
Historical Safety Reputation:
Generally excellent for their era, known for robust construction and effective crash structures. Official ratings from the period are less standardized than today.
Anti Lock Brakes:
Optional on many models, standard on higher trims and later years (ABS).
Airbags:
Driver's airbag became optional and then standard on many models during this period. Passenger airbags were introduced later.
Seatbelts:
Three-point seatbelts with pretensioners on front seats.
Chassis Structure:
Reinforced passenger cell, crumple zones.
Oil Change Interval:
Typically 7,500-10,000 miles or 12 months, depending on oil type and driving conditions. Consult manual for specific engine/year.
Major Service Intervals:
Major services often at 30,000, 60,000, 90,000 miles, including spark plugs, fuel filters, coolant, transmission service, and more extensive inspections.
Engine Oil Type:
API SG or SH classification, viscosity typically 15W-40, 10W-40, or 5W-40 synthetic depending on climate and engine. Manual specifies MB-Approval oils.
Coolant Type:
Mercedes-Benz specified silicate-free antifreeze/coolant (e.g., MB 325.0 or 325.2 specification). Typically a 50/50 mix with distilled water.
Transmission Fluid Type:
Automatic: MB 236.1 (Dexron II), MB 236.6, or MB 236.7. Manual: GL-4 gear oil.
Brake Fluid Type:
DOT 3 or DOT 4.
Power Steering Fluid Type:
MB 235.10 (MB Power Steering Fluid) or Pentosin CHF 11S.
Common W124 Issues:
Head gasket leaks (M104 engine), wiring harness degradation (especially fuel injection harness), vacuum line leaks, rust (wheel wells, rockers), sagging headliner, window regulator failures, differential pinion seal leaks.
Common W126 Issues:
Wiring harness issues, vacuum leaks, fuel distributor problems (K-Jetronic), idle control valve issues, climate control unit failures, sagging headliner, door panel delamination.
Common R107 Issues:
Rust (especially around windshield, floor pans, trunk), fuel distributor issues, vacuum leaks, oil leaks (valve covers, oil pan), aging rubber components, electrical connector corrosion.
Common W463 Issues:
Rust (similar to other models), electrical gremlins, differential and hub bearing issues, fuel system component failures, aging seals and bushings.
Mercedes Benz Legacy:
Pioneering automotive manufacturer with a long history of innovation, engineering excellence, and luxury vehicle production.
W124 Era:
Introduced in 1984/1985, the W124 revolutionized Mercedes-Benz design with its aerodynamic styling and advanced engineering. It was known for its build quality and longevity. Considered one of the best Mercedes ever made.
W126 Era:
The flagship S-Class, produced from 1979-1991. Set benchmarks for automotive safety, luxury, and technology. Known for its stately presence and comfort.
R107 Era:
Long-running SL-Class convertible (1971-1989). Famous for its durability, elegant styling, and comfortable open-top motoring. This period covers the later, more refined versions.
W463 Era:
The G-Wagen transitioned to the more luxurious W463 chassis in 1989, offering improved on-road manners and amenities while retaining its legendary off-road capability.
Manufacturing Locations:
Primarily Germany, with some assembly in other global locations.
