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MERCEDES-BENZ S420 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT MERCEDES-BENZ REPAIR SHOPS DON'T WANT YOU TO KNOW
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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about MERCEDES-BENZ S420 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 S420 automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR MERCEDES-BENZ S420 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 S420 cars and light trucks from 1990+
Mercedes-Benz -> Vacuum & Wiring Diagrams -> Vacuum Diagrams
Vehicle: 1998 MERCEDES-BENZ S420 4.2 V8 GAS
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BRAKE SERVICE PROCEDURES FOR MERCEDES-BENZ S420 AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported MERCEDES-BENZ S420 cars and light trucks from 1990+.
Anti-lock Brakes -> System Service -> ABS -> ABS Control Unit -> ASR/ETS/ESP -> Brake System Bleed -> C43, C230, C280, CLK320, CLK430, E300, E320, E430, S320, S420, SL500, SL600 & SLK230 & 1998-99 CL500, CL600, S500 & S600 -> CLK320, CLK430, E300, E320, E430, S320, S420, SL500 & SL600& 1998-99 CL500, CL600, S500 & S600 -> Component Replacement -> ESP Charging Pump -> ESP Pressurizing Piston Unit -> Front Wheel -> Hydraulic Unit -> Rear Axle -> Speed Sensor
Vehicle: 1998 MERCEDES-BENZ S420 4.2 V8 GAS
Brake System Bleed
Refer to procedure as outlined in "Hydraulic Brake Systems" section.
Component Replacement
Hydraulic Unit
ABS
ASR/ETS/ESP
C43, C230, C280, CLK320, CLK430, E300, E320, E430, S320, S420, SL500, SL600 & SLK230 & 1998-99 CL500, CL600, S500 & S600
- Turn ignition switch to Off position.
- Disconnect hydraulic lines. Seal lines and connections.
- Remove plastic caps and hydraulic unit.
- Reverse procedure to install. Torque hydraulic lines to 11 ft. lbs.
ABS Control Unit
CLK320, CLK430, E300, E320, E430, S320, S420, SL500 & SL600& 1998-99 CL500, CL600, S500 & S600
- On E300, E320 and E430 mo...
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FUEL FILTER REPLACEMENT PROCEDURES FOR MERCEDES-BENZ S420 AUTOMOBILES
Fuel filter replacement procedures with corresponding images for most domestic and imported MERCEDES-BENZ S420 cars and light trucks sold in the U.S. for 1980+.
Mercedes-Benz -> Fuel Filter Replacement -> Except 2003-06 E320 & E500 Sedans Less 4 Matic & 2004-06 E Series w/Gasoline Engines -> Fuel System Pressure Relief -> Removal & Installation
Vehicle: 1997 MERCEDES-BENZ S420 4.2 V8 GAS
Fuel System Pressure Relief
Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.
Prior to disconnecting fuel lines, the fuel system pressure must be relieved to prevent accidental fuel spray.
After the battery has been disconnected and reconnected, some abnormal driveability symptoms may occur. The vehicle may need to be driven while it relearns its adaptive strategy.
- Ensure t...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR MERCEDES-BENZ S420 AUTOMOBILES
Includes CV axle, universal joint, and driveline replacement, for domestic and imported MERCEDES-BENZ S420 cars and light trucks from 1990+.
DRIVESHAFT, Replace
Vehicle: 1994 MERCEDES-BENZ S420 4.2 V8 GAS
- Raise vehicle and support.
- Unscrew exhaust shielding plate.
- On models with 4MATIC, unscrew exhaust shielding plate.
- Lift transmission and support.
- Unscrew cross bridge.
- Unscrew hex, head screws and hex nut and remove rear engine carrier with engine mount.
- On all models, loosen propeller shaft clamping nut for approx. two turns without sliding back rubber sleeve (sliding along).
- Remove front propeller shaft from transmission. Flexible coupling remains on propeller shaft.
- Remove front propeller shaft from transfer case.
- Prior to sliding back propeller shaft, loosen vulcanized fitted ...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR MERCEDES-BENZ S420 AUTOMOBILES
Includes starter and alternator replacement procedures for domestic and imported MERCEDES-BENZ S420 cars and light trucks from 1990+.
Alternator, Replace
Vehicle: 1994 MERCEDES-BENZ S420 4.2 V8 GAS
- Remove drive belt.
- Remove engine compartment paneling.
- Remove front noise encapsulation.
- Disconnect battery ground cable at battery.
- Disconnect electrical connections at alternator.
- Remove alternator mounting bolts.
- Remove torsion bar bracket on left and right frame side me...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR MERCEDES-BENZ S420 AUTOMOBILES
Cabin air filter locations and replacement procedures with corresponding images for most domestic and imported MERCEDES-BENZ S420 cars and light trucks sold in the U.S. as equipped to the current model year.
Cabin Air Filter Service -> Mercedes-Benz -> 1994-99 S Class
Vehicle: 1997 MERCEDES-BENZ S420 4.2 V8 GAS
Under normal operating conditions the cabin air filter should be replaced every 15,000 miles. In dusty areas change the cabin air filter more often.
- Open the hood.
- Pull the up cowl seal.
- Disconnect the vacuum hoses from the main air flap actuators.
- Lift up the air plenum housing.
- Turn the windshield heating thermal valve counterclockwise to disengage.
- Lift the outside temperature sensor upward and pos...
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MAINTENANCE LAMP RESET PROCEDURES FOR MERCEDES-BENZ S420 AUTOMOBILES
Maintenance lamp reset procedures with corresponding images for most domestic and imported MERCEDES-BENZ S420 cars and light trucks sold in the U.S. from 1990+.
Mercedes-Benz -> Check Engine Lamp ->
Vehicle: 1994 MERCEDES-BENZ S420 4.2 V8 GAS
The Check Engine lamp should illuminate when the ignition switch is placed in the On position to indicate the lamp is operational. After the engine has been started, the warning lamp should go off. If warning lamp comes on while th...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR MERCEDES-BENZ S420 AUTOMOBILES
Includes radiator, cooling and heater hose replacement procedures for domestic and imported MERCEDES-BENZ S420 cars and light trucks from 1990+
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 1995 MERCEDES-BENZ S420 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 to i...
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SERPENTINE BELT SERVICE PROCEDURES FOR MERCEDES-BENZ S420 AUTOMOBILES
Serpentine belt replacement procedures with corresponding images for most domestic and imported MERCEDES-BENZ S420 cars and light trucks sold in the U.S. from 1990+.
Serpentine Drive Belt, Replace
Vehicle: 1997 MERCEDES-BENZ S420 4.2 V8 GAS
- Remove fan shroud ring and place over fan.
- On first versions, proceed as follows:
- Loosen adjusting bolt 1/4-1/2 turn.
- Loosen tensioning nut (turn to left).
- Remove drive belt.
- Inspect pulley surfaces and replace as required.
- Set pointer at marking 1.
- Install belt starting at tensioning pulley.
- Tighten tensioning nut until setting point...
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COMPONENT LOCATION DIAGRAMS FOR MERCEDES-BENZ S420 AUTOMOBILES
Component location diagrams for most MERCEDES-BENZ S420 cars and light trucks sold in the U.S. from 1990+.
Instrument Cluster, Fuel Level Sensor & Outside Temperature Indicator Sensor Diagram for 1997 MERCEDES-BENZ S420 4.2 V8 GAS Components on diagram: |
Speed Sensitive Power Steering Components Diagram for 1994 MERCEDES-BENZ S420 4.2 V8 GAS Components on diagram: |
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WIRING DIAGRAMS FOR MERCEDES-BENZ S420 AUTOMOBILES
OEM drawn wiring diagrams for most MERCEDES-BENZ S420 cars and light trucks sold in the U.S.
1998 MERCEDES-BENZ S420 4.2 V8 GAS Wiring Diagram Components on diagram: |
1999 MERCEDES-BENZ S420 4.2 V8 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR MERCEDES-BENZ S420 AUTOMOBILES
OEM TSB listings for most MERCEDES-BENZ S420 cars and light trucks sold in the U.S. from 1985+.
Document: MICHELIN PILOT SPORT A/S TIRES - REVISED Vehicle: 1994 MERCEDES-BENZ S420 4.2 V8 GAS Auto Systems: |
Document: TECHNICAL INFORMATION UPDATE ANNOUNCEMENT Vehicle: 1994 MERCEDES-BENZ S420 4.2 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR MERCEDES-BENZ S420 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most MERCEDES-BENZ S420 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 S420 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 S420 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 S420 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
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