Ignition and engine management system M-Class (W163)

Engine Electrical System Specifications
Note: Individual characteristics are also given in the text of the Chapter and, if their implementation is mandatory, are highlighted in bold. Battery Electrolyte...

Basic information and safety precautions
The ignition system ensures ignition of the air-fuel mixture supplied to the combustion chambers of the cylinders. To form a spark of the required intensity, the 12-volt...

Checking the ignition and injection control system
Note: See also Section Troubleshooting in the Introduction at the beginning of the Guide. General information Ignition/engine control system components are...

Troubleshooting — General Information and Preliminary Checks
Note: Please also refer to Section Troubleshooting . The ignition system and the fuel system are interconnected components of the engine management system, so some of...

Checking and adjusting the ignition timing angle
Since the ignition timing is constantly monitored and adjusted by the engine management system, manual adjustment of this setting is not provided. If necessary, the...

Spark plugs — checking condition
The spark plug consists of a central electrode, an insulator with a housing and a ground electrode(s). A spark jumps between the central electrode and the ground...

Removal and installation ignition coils — petrol models
Attention! Before proceeding with the procedure, please read the list of safety measures set out in Section Basic information and safety precautions ! M111 Attention!...

Removal and installation the crankshaft position sensor (CKP)
CKP Sensor (L5) Installation Details for 111 Series Engine CKP sensor installation details (L5) for 112 and 113 series engines 1. The installation details of the CKP...

Removal and installation the camshaft position sensor (CMP)
111 Series Engine CMP Sensor Installation Details 11/1 — Sealing ring 11/2 — Adjusting shim L5/1 — CMP sensor Adjusting the CMP sensor using a blade type feeler gauge 1....

Removal and installation the camshaft Hall sensor
Petrol engines of the 112, 113 series and diesel engines of the 612 series. The installation details of the camshaft Hall sensor on 112 and 113 series petrol engines are...

Removal and installation knock sensors (KS) — petrol engines
The details of installing the KS sensor on a 111 series engine are shown in the illustrations - make sure that the electrical wiring connector is securely fastened....

Diesel engine preheating system
To achieve the required ignition temperature of the air-fuel mixture compressed in the cylinders of a cold engine, a pre-heating system is used. A special spark plug is...

Checking glow plugs
If you have difficulty starting the engine, first check that all glow plugs are functioning properly. The test is performed on a cold engine (ambient temperature) and a...

Removal and installation glow plugs
Diesel Engine Glow Plug Installation Details 1. The details of installing glow plugs are shown in the illustration, to which all references in the text refer. 2. Start...

Removal and installation the coolant temperature sensor (ECT)
ECT Sensor Installation Details on Diesel Models 1. The details of the ECT sensor installation are shown in the illustration to which all references in the text refer....

Diagnostics of electronic control systems and diagnostic equipment
The OBD system includes several diagnostic devices that monitor individual parameters of the toxicity reduction systems and record detected failures in the on-board...

Controller for interfacing a personal computer with the on-board self-diagnostic system OBD II
Controller for interfacing a personal computer with the on-board OBD II self-diagnostic system according to SAE (PWM and VPW) and ISO 9141-2 standard protocols. Note: GM...

Using an Oscilloscope to Monitor the Performance of a Control System
Digital multimeters are great for testing static electrical circuits and for recording slow changes in monitored parameters. When performing dynamic tests on a running...

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W163 (1997-2005)