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W123 (1976-1985) W124 (1984-1995) W210 (1996-2002)
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Checking control devices (Mercedes-Benz E-Class W210)

0
Always read the instrument cluster before starting to drive (the composition of the indicators depends on the vehicle modification). When the ignition is turned on, all the control lamps should light up. This is a check of the lamps' serviceability. After a few seconds (4 sec for SRS lamp, 30 sec for others) or after starting the engine, the lamps should go out, otherwise you need to look for the cause of the malfunction. Such a check, especially when buying a used car, can detect possible malfunctions, which are indicated by the burning control lamps.

Sequence of works




"Daily"

1. Coolant temperature gauge. With some exceptions (driving uphill with a trailer, low octane fuel) the arrow should be outside the red zone. Starting from +130°C the coolant boils.

2. Coolant level indicator. If the indicator lamp does not go out, the sensor in the expansion tank or upper radiator reservoir has been triggered. It is necessary to top up the coolant (after the pressure drops). If the lamp lights up again shortly after this, check the tightness of the system or the corresponding sensor.

3. Ambient air temperature indicator. The temperature is determined by a sensor located under the bumper and is displayed in the instrument cluster. The readings depend on the speed of movement and the time since the engine was stopped. If the car has stopped, the last reading is saved when the temperature rises. The readings begin to change only after a certain period of time. A drop in temperature is reflected without delay.



4. Direction indicator lamp. Both indicators in the instrument cluster and the hazard warning switch lamp should flash in unison when the turn signal is switched on. When towing a trailer, the turn signal indicator lamp should also flash.

5. ASR and ETS warning light. The indicator on the speedometer should light up while driving only if a wheel is slipping on a slippery road.

6. Speedometer. A few meters after the start, the needle should begin to move. The speedometer drive cable is missing in this car.

7. Odometer and trip meter. Both indicators should change their readings while the car is moving. With the ignition on, press its button once to reset the daily mileage counter; with the ignition off, press it twice.

8. Tachometer. The device shows the engine crankshaft speed. Avoid getting the pointer into the red zone (exceeding maximum frequency).

9. Electronic clock. The adjustment handle is on the right side of the instrument cluster.

10. High beam indicator. When the high beam signal is on or when the high beam is on, the blue indicator should light up.

11. Oil level indicator. If, with the engine running and the oil temperature above +60°C, the indicator with the oil can symbol lights up, the oil level has dropped to the lower mark on the dipstick.

12. Brake system warning light. The red indicator with the brake pad symbol lights up when the parking brake is applied and the brake fluid level in the reservoir is insufficient.

13. Washer fluid level indicator. Lights up when there is about 1 liter of liquid left in the tank.



14. Brake pad wear indicator. Lights up when braking if the front brake pads are worn out. On cars with the ASR system, wear sensors are also installed on the rear pads. If, as a result of pad wear, they touch the brake disc, the indicator receives a short circuit to ground.

15. Battery charge indicator light. After starting the engine, the lamp with the battery symbol should go out. Otherwise, the battery is not receiving a charge or the alternator belt has broken. Stop the engine immediately if the lamp does not go out even when you lightly press the accelerator pedal.

16. External lighting test lamp. The yellow indicator with the lamp symbol lights up when the external lighting is faulty. Stop and check, replace the burnt-out lamp if necessary.

17. SRS system warning light. Should go out after testing the system when the ignition is turned on. Otherwise, there is a malfunction in the airbag and seat belt tensioners.

18. ABS, ASR, ETS control lamps. If the lamps are on while the car is moving, the corresponding system has failed. Conduct diagnostics of the corresponding controller at the service station using the fault codes and consult on repair.

19. Preheating system indicator. When the ignition is turned on, the lamp lights up until the engine is ready to start. If the lamp does not light up, the control indicator is faulty.

20. Rear Window Defogger Indicator. The switch lamp on the center console should light when turned on.

21. Rear fog light indicator lamp. When you pull the light switch out two positions, the orange light in the middle should light up.

22. Heated seats. The indicator lights should come on when the system's two-position switch is turned on.
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The article has been verified: Polyakov Zakhar Grigorievich
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E-Class W210 / Equipment and devices
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Control devices — general description
Electrical equipment — general information
Instrument cluster — general description
Removal the instrument cluster
Tempomat (cruise control)
Airbag system and seat belt pretensioners
Wires and fuses
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W210 (1996-2002) 
  • General information
  • Vehicle description
  • Working conditions and tools
  • Car care
  • Diesel engines
  • Engine repair
  • Lubrication system
  • Cooling system
  • Injection system
  • Supply system
  • Exhaust system
  • Gasoline engines
  • Engine repair
  • Lubrication system
  • Cooling system
  • Control system
  • Power and exhaust system
  • Transmission
  • Clutch
  • Mechanical gearbox
  • Automatic gearbox
  • Drive shafts
  • Chassis
  • Car suspension
  • Steering
  • Tires and wheels
  • Brake system
  • Body
  • Exterior (external elements)
  • Interior (internal elements)
  • Doors and windows
  • Heating and ventilation
  • Electrical equipment
  • Equipment and devices
  • Power devices
  • Lighting and signaling
  • Electrical circuits
W124 (1984-1995) 
  • General information
  • Governing bodies
  • Driving and operation
  • Weekly care
  • Maintenance (gasoline)
  • Maintenance (diesel)
  • Troubleshooting
  • Power unit
  • I4 petrol engine
  • V6 petrol engine (SOHC)
  • V6 petrol engine (DOHC)
  • Diesel engines
  • Engine overhaul
  • Cooling system
  • Heating and ventilation
  • Fuel system (carburetor)
  • Injection system «Bosch CIS-E»
  • Injection system «Bosch HFM»
  • Diesel fuel system
  • Supply system
  • Starting and charging system
  • Ignition system (I4)
  • Ignition system (V6)
  • Preheating
  • Transmission
  • Clutch
  • Mechanical gearbox
  • Automatic gearbox
  • Drive shafts
  • Chassis
  • Brake system
  • Car suspension
  • Steering
  • Body
  • Exterior (external elements)
  • Interior (internal elements)
  • Doors, locks and windows
  • Electrical equipment
  • Equipment and devices
  • Switches
  • Headlights and lighting
  • Electrical circuits
W123 (1976-1985) 
  • General information
  • Introduction to the guide
  • Power unit
  • Engine device
  • Repair M102 engines
  • Repair M110 and M123 engines
  • Cooling and lubrication (M102)
  • Cooling (M110 and M123)
  • Ignition system
  • Power system «Stromberg»
  • Power system «Solex 4A1»
  • Fuel injection «K-Jetronic»
  • Fuel injection «L-Jetronic»
  • Transmission
  • Clutch
  • Mechanical gearbox
  • Automatic gearbox
  • Cardan and rear axle
  • Chassis
  • Front suspension
  • Rear suspension
  • Steering
  • Brake system
  • Body
  • Exterior (external elements)
  • Interior (internal elements)
  • Doors, locks and windows
  • Electrical equipment
  • Equipment and devices
  • Power devices
  • Electrical circuits
 
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