Contents: Crankshaft speed sensor ↡ Coolant temperature sensor ↡ Electronic control unit ↡ Electromagnetic actuator ↡
Crankshaft speed sensor
Removal
1. Remove the ground cable from the battery.
2. Disconnect the crankshaft sensor electrical connector, which is located in the engine compartment behind the battery.
3. The crankshaft sensor is mounted on the mating surface between the cylinder block and the clutch housing above the starter. Unscrew the bolt and remove the crankshaft sensor from the clutch housing. Remove the gasket.
Installation
1. Installation is carried out in the reverse order of removal.
Coolant temperature sensor
Removal
1. Drain some of the coolant from the cooling system. Check that the ignition is off.
2. The coolant temperature sensor is located on the upper left side of the cylinder head.
Original source of information (mercedesman)
3. Disconnect the electrical connector from the coolant temperature sensor.
4. Unscrew the sensor and remove the sealing ring.
Installation
1. Installation is performed in the reverse order of removal. Add coolant to the cooling system.
Electronic control unit
Removal
1. The ELR electronic control unit is mounted in the rear of the engine compartment.
2. Remove the ground cable from the battery.
3. Disconnect the multi-pin electrical connector from the control unit.
4. Remove the screws and remove the electronic control unit from the engine compartment bulkhead.
Installation
1. Installation is carried out in the reverse order of removal.
Electromagnetic actuator
Removal
Side view of the rear of the high pressure fuel pump
A – electromagnetic actuator ELR;
B – electromagnetic actuator ARA
1. The ELR solenoid actuator is bolted to the rear of the high pressure fuel pump. On vehicles with the ELR electronic idle speed control and the ARA anti-knock system, the ELR solenoid actuator is the upper unit of two units located at the rear of the fuel pump.
2. Remove the ground cable from the battery.
3. On non-turbocharged models, remove the air filter.
4. Disconnect the electrical connector from the solenoid actuator.
5. Remove the two bolts and remove the solenoid actuator housing from the rear of the fuel pump.
6. Remove the sealing ring, gasket and spacer plate.
Installation
1. Installation is carried out in the reverse order of removal.