Vehicle Segment:
Mid-size luxury sedan.
Target Audience:
Discerning buyers seeking comfort, performance, and advanced technology.
Key Competitors:
BMW 5 Series (E39), Audi A6 (C4/C5), Lexus GS300.
Performance Orientation:
The E420, with its V8 engine, offered a significant performance upgrade over its 6-cylinder counterparts.
Luxury Appointments:
Known for its refined interior, build quality, and advanced features for its era.
Diy Savings:
Enables owners to perform complex maintenance and repairs, significantly reducing dealership or independent shop labor costs.
Accurate Information:
Provides manufacturer-accurate procedures and specifications, crucial for maintaining Mercedes-Benz vehicles correctly.
Engine Mechanical:
Engine assembly, disassembly, rebuild, timing, cooling system, lubrication system.
Engine Management:
Fuel injection system (KE-Jetronic variant for M119.960), ignition system, emissions control systems, electronic control unit (ECU) diagnostics and testing.
Transmission:
Automatic transmission (722.6 '722.6xx' 5G-TRONIC) service, diagnosis, overhaul, torque converter, hydraulic control unit.
Drivetrain:
Driveshafts, universal joints, differential, axles.
Suspension:
Front and rear suspension components, shock absorbers, springs, control arms, bushings, alignment procedures.
Steering:
Power steering system, steering rack, linkage, steering column.
Brakes:
Hydraulic system, ABS (Anti-lock Braking System), ESP (Electronic Stability Program), brake discs, calipers, pads, lines, bleeding procedures.
Electrical System:
Battery, charging system, starter, lighting, fuses, relays, wiring diagrams, power distribution.
Body And Chassis:
Body panels, doors, hood, trunk, interior trim, glass, weatherstripping, chassis components.
HVAC:
Heating, Ventilation, and Air Conditioning (HVAC) system service, refrigerant handling, blower motor, climate control unit.
Body Electronics:
Central locking, power windows, power seats, mirrors, immobilizer system, keyless entry (if equipped).
Scheduled Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection and replacement.
Diagnostics Troubleshooting:
Systematic troubleshooting guides, fault code identification, symptom-based repair procedures.
Component Removal Installation:
Detailed instructions for removing and installing all major mechanical and electrical components.
Engine Rebuild:
Complete engine overhaul instructions, including cylinder head service, piston and connecting rod installation, crankshaft and bearing replacement.
Transmission Overhaul:
Detailed steps for rebuilding the 722.6 automatic transmission, including clutch pack replacement, valve body servicing, and solenoid testing.
Brake System Repair:
Brake pad/disc replacement, caliper service, ABS/ESP component testing and replacement, brake fluid flush.
Electrical Diagnostics:
Wiring diagram interpretation, component testing, circuit troubleshooting.
Bodywork Repair:
Dent repair, panel replacement, door alignment, glass replacement.
Depth:
Comprehensive, covering everything from basic fluid changes to complete engine and transmission overhauls.
Diagnostic Codes:
Includes procedures for reading and interpreting diagnostic trouble codes (DTCs) from various ECUs.
Specifications:
Detailed torque specifications, clearances, fluid capacities, and diagnostic data.
Oil Change Interval:
Typically every 7,500-10,000 miles (12,000-16,000 km) or 12 months, whichever comes first, with synthetic oil.
Transmission Fluid Change:
Recommended every 40,000-60,000 miles (64,000-96,000 km).
Coolant Flush:
Recommended every 30,000-40,000 miles (48,000-64,000 km) or 2-3 years.
Spark Plug Replacement:
Typically every 60,000-100,000 miles (96,000-160,000 km), depending on spark plug type.
Engine Oil Type:
Full Synthetic SAE 0W-40 or 5W-40 meeting MB Approval 229.3 or 229.5.
Coolant Type:
Mercedes-Benz Approved Antifreeze/Coolant (e.g., G05 formulation or equivalent).
Brake Fluid Type:
DOT 4 High Performance Brake Fluid.
Crankshaft Position Sensor:
Can fail, leading to no-start or stalling issues.
Mass Air Flow Sensor:
Can become contaminated or fail, affecting engine performance and fuel economy.
Oil Cooler Seals:
Potential for leaks, especially the O-rings at the cooler lines.
Window Regulators:
Can wear out or break, causing windows to fail to operate.
Rust And Corrosion:
Prone to rust in wheel wells, rocker panels, and door bottoms if not properly maintained or if exposed to harsh climates.
Valve Cover Gaskets:
Common source of oil leaks, especially with age.