Injection system (gasoline) of the car Mercedes C-Class (W202)

PMS and HFM engine management systems
C-class engines are equipped with an electronic ignition and fuel injection system. The ignition and injection systems are controlled by one common control device. This...

How the PMS system works
1.8/2.0L Engines PMS Diagram - Fuel Injection Systems (1.8/2.0 L engines) 36. Thermostat (only type 124); 40. Membrane pressure regulator; 41. Membrane pressure damper...

How the HFM system works
A significant difference compared to the PMS engine management system is the use of an air mass meter with film heater (HFM) instead of an air pressure sensor. Air mass...

Self-diagnosis of the state of the ignition and fuel injection system
With HFM and PMS control systems, it is no longer necessary to adjust the engine idle speed and carbon monoxide content. The system controls itself and accumulates...

Air mass meter — removal and installation
Removing 1. Remove the plug (arrow) from the air mass meter (B2/5), after loosening the union nut on the connector. 2. Loosen the clamp (4/7). 3. Loosen clamp (4/13) and...

Coolant temperature sensor — removal, inspection and installation
The temperature sensor measures the temperature of the coolant and transmits electrical signals to the control device. The sensor is equipped with an NTC element (NTC -...

Intake air sensor — removal, inspection and installation
The temperature sensor measures the intake air temperature. This value together with the intake manifold pressure sensor signal (PMS management system) serves as a...

Vacuum piping system
1.8/2.0L Engines 30. Membrane pressure regulator; 60. Membrane mechanism of the vacuum ignition timing regulator in the modulating pressure system (only with automatic...

Fuel distributor with valve injectors
Removing Attention! Make sure your workplace is well ventilated! Fuel vapors are poisonous, avoid naked flames due to fire hazard! 1. Disconnect the ground wire from the...

Valve injectors — removal and installation
Removing 1. Remove the fuel distributor together with valve injectors. 2. Remove rotation stops (16/7) on valve injectors. 3. Pull the valve injectors out of the fuel...

Oxygen sensor (lambda probe) — removal and installation
Removing 1. Remove the right hand guard behind the cab front wall. 2. Dismantle the magazine with wires on the front wall of the cab. To do this, pull out the expansion...

Diagnostics of malfunctions of system of injection of gasoline
Before a fault can be found based on fault diagnosis, the following checkpoints must be met: start the engine correctly. The following is true for both a cold and a warm...

What you need to know the owner of a car with an injection engine
Injection engines are superior to carburetor ones in many ways, take at least their efficiency and trouble-free start in cold weather. Nevertheless, carburetor in our...

Repair and replacement of the turbocharger
Rule N1 : don't even think about repairing a turbocharger at home. Rule N2 : you can replace a faulty turbocharger with a new one without much difficulty. Not so long...