Auto Parts Search
MERCEDES-BENZ 420SEL CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT MERCEDES-BENZ REPAIR SHOPS DON'T WANT YOU TO KNOW
Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!Select Year
1991 | 1990 | 1989 | 1988 |
1987 | 1986 |
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about MERCEDES-BENZ 420SEL car and truck repair procedures including MERCEDES-BENZ engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up & drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix your MERCEDES-BENZ 420SEL automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR MERCEDES-BENZ 420SEL AUTOMOBILES
Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported MERCEDES-BENZ 420SEL cars and light trucks from 1990+
Mercedes-Benz -> Component Replacement & Adjustment -> PRECAUTIONS -> AIR BAG SYSTEM DISARMING & ARMING
Vehicle: 1991 MERCEDES-BENZ 420SEL 4.2 V8 GAS
AIR BAG SYSTEM DISARMING & ARMING
Refe...
CLICK HERE TO GET FULL ACCESS TO MERCEDES-BENZ 420SEL A/C & HEATER SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR MERCEDES-BENZ 420SEL AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported MERCEDES-BENZ 420SEL cars and light trucks from 1990+.
MERCEDES-BENZ, HYDRAULIC BRAKE SYSTEMS -> HYDRAULIC BRAKE SYSTEMS -> HYDRAULIC BRAKE SPECIFICATIONS
Vehicle: 1991 MERCEDES-BENZ 420SEL 4.2 V8 GAS
CLICK HERE TO GET FULL ACCESS TO MERCEDES-BENZ 420SEL BRAKE SERVICE PROCEDURES
FUEL FILTER REPLACEMENT PROCEDURES FOR MERCEDES-BENZ 420SEL AUTOMOBILES
Fuel filter replacement procedures with corresponding images for most domestic and imported MERCEDES-BENZ 420SEL cars and light trucks sold in the U.S. for 1980+.
Mercedes-Benz -> Fuel Filter Scheduled Maintenance -> 1980-02 Models w/Gasoline Engines -> Normal Service -> Severe Service
Vehicle: 1991 MERCEDES-BENZ 420SEL 4.2 V8 GAS
Normal Service
Replace e...
CLICK HERE TO GET FULL ACCESS TO MERCEDES-BENZ 420SEL FUEL FILTER REPLACEMENT PROCEDURES
DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR MERCEDES-BENZ 420SEL AUTOMOBILES
Includes CV axle, universal joint, and driveline replacement, for domestic and imported MERCEDES-BENZ 420SEL cars and light trucks from 1990+.
CV AXLE SHAFT, Replace
Vehicle: 1991 MERCEDES-BENZ 420SEL 4.2 V8 GAS
- Raise and support vehicle, then remove wheel, Fig. .
- Remove front axle shaft attaching collar nut.
- Remove lower engine compartment cover.
- Using suitable socket, remove axle shaft from connecting flange.
- Using suitable wire, secure inner joint in compressed piston.
- Position steering wheel to right stop.
- Using suitable plastic hammer, loosen fron...
CLICK HERE TO GET FULL ACCESS TO MERCEDES-BENZ 420SEL DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES
STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR MERCEDES-BENZ 420SEL AUTOMOBILES
Includes starter and alternator replacement procedures for domestic and imported MERCEDES-BENZ 420SEL cars and light trucks from 1990+.
Starter, Replace
Vehicle: 1991 MERCEDES-BENZ 420SEL 4.2 V8 GAS
- Disconnect battery ground cable from battery.
- Remove electrical connections from...
CLICK HERE TO GET FULL ACCESS TO MERCEDES-BENZ 420SEL STARTER & ALTERNATOR REPLACEMENT PROCEDURES
MAINTENANCE LAMP RESET PROCEDURES FOR MERCEDES-BENZ 420SEL AUTOMOBILES
Maintenance lamp reset procedures with corresponding images for most domestic and imported MERCEDES-BENZ 420SEL cars and light trucks sold in the U.S. from 1990+.
Mercedes-Benz -> Anti-Lock Brake System Warning Lamp ->
Vehicle: 1990 MERCEDES-BENZ 420SEL 4.2 V8 GAS
The Anti-Lock Brake (ABS) System warning lamp, will illuminate when the ignition switch is placed in the On position to indicate the warning lamp is operational. The lamp should go off when the engine is started. If the warning lamp remains on after the engine has been started or while driving the vehicle, a fault in the ABS has been detected. While the fault is present in the ABS, the ABS is switched off. When the ABS is ...
CLICK HERE TO GET FULL ACCESS TO MERCEDES-BENZ 420SEL MAINTENANCE LAMP RESET PROCEDURES
RADIATOR & HOSE REPLACEMENT PROCEDURES FOR MERCEDES-BENZ 420SEL AUTOMOBILES
Includes radiator, cooling and heater hose replacement procedures for domestic and imported MERCEDES-BENZ 420SEL cars and light trucks from 1990+
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 1991 MERCEDES-BENZ 420SEL 4.2 V8 GAS
Lower
- Drain coolant into a suitable container.
- Reposition clamp at radiator and remove hose.
- Reposition clamp at water pump and remove hose.
- Remove hose from vehicle.
- Reverse procedure t...
CLICK HERE TO GET FULL ACCESS TO MERCEDES-BENZ 420SEL RADIATOR & HOSE REPLACEMENT PROCEDURES
SERPENTINE BELT SERVICE PROCEDURES FOR MERCEDES-BENZ 420SEL AUTOMOBILES
Serpentine belt replacement procedures with corresponding images for most domestic and imported MERCEDES-BENZ 420SEL cars and light trucks sold in the U.S. from 1990+.
Serpentine Drive Belt, Replace
Vehicle: 1990 MERCEDES-BENZ 420SEL 4.2 V8 GAS
- On models equipped with viscous fan clutch, remove union nut by turning nut counterclockwise.
- On models equipped with electric fan, disconnect electrical connector at engine and air conditioning fan.
- Remove retaining pin on right and left side.
- Press together retainer clamp of radiator on right and left and release radiator bridge.
- Press clamps on right and left at sa...
CLICK HERE TO GET FULL ACCESS TO MERCEDES-BENZ 420SEL SERPENTINE BELT SERVICE PROCEDURES
COMPONENT LOCATION DIAGRAMS FOR MERCEDES-BENZ 420SEL AUTOMOBILES
Component location diagrams for most MERCEDES-BENZ 420SEL cars and light trucks sold in the U.S. from 1990+.
RH Front Footwell Diagram for 1991 MERCEDES-BENZ 420SEL 4.2 V8 GAS Components on diagram: |
RH Front Footwell Diagram for 1991 MERCEDES-BENZ 420SEL 4.2 V8 GAS Components on diagram: |
CLICK HERE TO GET FULL ACCESS TO MERCEDES-BENZ 420SEL PARTS/COMPONENTS LOCATION DIAGRAMS!
WIRING DIAGRAMS FOR MERCEDES-BENZ 420SEL AUTOMOBILES
OEM drawn wiring diagrams for most MERCEDES-BENZ 420SEL cars and light trucks sold in the U.S.
1990 MERCEDES-BENZ 420SEL 4.2 V8 GAS Wiring Diagram Components on diagram: |
1990 MERCEDES-BENZ 420SEL 4.2 V8 GAS Wiring Diagram Components on diagram: |
CLICK HERE TO GET FULL ACCESS TO MERCEDES-BENZ 420SEL WIRING DIAGRAMS!
TECHNICAL SERVICE BULLETINS FOR MERCEDES-BENZ 420SEL AUTOMOBILES
OEM TSB listings for most MERCEDES-BENZ 420SEL cars and light trucks sold in the U.S. from 1985+.
Document: 102 - CROSS REFERENCE/MAIN BEARINGS TO CRANKCASE Vehicle: 1986 MERCEDES-BENZ 420SEL 4.2 V8 GAS Auto Systems: |
Document: RETURNING ALTERNATORS AND REGULATORS EQUIPPED WITH BSS OT LIN COMMUNICATION - REVISED Vehicle: 1988 MERCEDES-BENZ 420SEL 4.2 V8 GAS Auto Systems: |
CLICK HERE TO GET FULL ACCESS TO MERCEDES-BENZ 420SEL TECHNICAL SERVICE BULLETINS!
COMPONENT/PARTS SPECIFICATIONS FOR MERCEDES-BENZ 420SEL AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most MERCEDES-BENZ 420SEL cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most MERCEDES-BENZ 420SEL cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most MERCEDES-BENZ 420SEL cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most MERCEDES-BENZ 420SEL cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
CLICK HERE TO GET FULL ACCESS TO MERCEDES-BENZ 420SEL SPECIFICATIONS DATA!
Shop online for auto body parts, engines, wheels, lights...
More parts |
Get the Complete Technical Service Bulletins! |
Access diagrams and repair information such as wiring diagrams, diagnosis and repair charts, manufacturer service bulletins, and OEM Part numbers of your MERCEDES-BENZ 420SEL vehicle. |
Access the Complete guide! |