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1990 MERCEDES-BENZ 300SEL CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT MERCEDES-BENZ REPAIR SHOPS DON'T WANT YOU TO KNOW
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- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
A/C & HEATER SERVICE PROCEDURES FOR 1990 MERCEDES-BENZ 300SEL AUTOMOBILES
A/C & Cooling System Maintenance -> Mercedes-Benz -> 1990-2004
Vehicle: 1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS
NOTE: Some Models Are Eq...
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BRAKE SERVICE PROCEDURES FOR 1990 MERCEDES-BENZ 300SEL AUTOMOBILES
MERCEDES-BENZ -> TIGHTENING SPECIFICATIONS
Vehicle: 1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1990 MERCEDES-BENZ 300SEL AUTOMOBILES
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: 1990 MERCEDES-BENZ 300SEL 3.0 L6 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 1990 MERCEDES-BENZ 300SEL AUTOMOBILES
DRIVESHAFT, Replace
Vehicle: 1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS
- Raise vehicle and support.
- Unscrew exhaust shielding plate.
- On models with 4MATIC, unscrew exhaust shielding plate.
- Lift transmission and support.
- Unscrew hex, head screws and hex nut and remove rear engine carrier with engine mount.
- Unscrew cross bridge.
- 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 1990 MERCEDES-BENZ 300SEL AUTOMOBILES
Alternator, Replace
Vehicle: 1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS
- Disconnect battery ground cable at battery.
- Remove drive belt.
- Remove protective cover, as required, and disconnect electrical connectors.
- Remove alternator mounting bol...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1990 MERCEDES-BENZ 300SEL AUTOMOBILES
Mercedes-Benz -> Low Engine Oil Level Warning Lamp ->
Vehicle: 1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS
The Low Engine Oil Level warning lamp will illuminate when the ignition switch is placed in the On position to indicate the warning lamp is operational. After the engine has been started, the warning lamp should go off. If the warning lamp remains on after the engine has been started or com...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1990 MERCEDES-BENZ 300SEL AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS
Inlet
- Drain coolant into a suitable container.
- Reposition clamp on heat exchanger feed pipe and remove hose.
- Reposition clamp on engine and remove hose.
- Remove hose from vehicle.
- Reverse procedure to...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1990 MERCEDES-BENZ 300SEL AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS
- Remove fan and fan shroud.
- Rotate tensioner counterclockwise using suitable tool to remove drive belt.
- Remove drive belt.
- Clean and i...
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COMPONENT LOCATION DIAGRAMS FOR 1990 MERCEDES-BENZ 300SEL AUTOMOBILES
Component location diagrams for most 1990 MERCEDES-BENZ 300SEL cars and light trucks sold in the U.S. from 1990+.
LH Side Of Engine Compartment Diagram for 1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS Components on diagram: |
LH Side Of Engine Compartment Diagram for 1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 1990 MERCEDES-BENZ 300SEL AUTOMOBILES
OEM drawn wiring diagrams for most 1990 MERCEDES-BENZ 300SEL cars and light trucks sold in the U.S.
1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS Wiring Diagram Components on diagram: |
1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1990 MERCEDES-BENZ 300SEL AUTOMOBILES
OEM TSB listings for most 1990 MERCEDES-BENZ 300SEL cars and light trucks sold in the U.S. from 1985+.
Document: Introduction of Improved Single-Component Windshield/Window Bonding System Vehicle: 1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS Auto Systems: |
Document: Instrument Cluster Oil Level Messages Vehicle: 1990 MERCEDES-BENZ 300SEL 3.0 L6 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1990 MERCEDES-BENZ 300SEL AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1990 MERCEDES-BENZ 300SEL 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 1990 MERCEDES-BENZ 300SEL 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 1990 MERCEDES-BENZ 300SEL 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 1990 MERCEDES-BENZ 300SEL 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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