The document discusses common ignition system problems for Mercedes vehicles and their potential solutions. It lists issues like early or late ignition timing, spark plug failures, engine misfires, and increased fuel consumption. Specific problems covered include faulty spark plugs, incorrect ignition timing, and low voltage circuit issues. The document recommends purchasing a high-quality ignition control board from Sacer to resolve ignition problems, as Sacer's boards undergo rigorous testing and quality control.

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Problems and solutions for Ignition system of your Mercedes
Preface: The ignition system is the main system of the gasoline engine, which depends
on whether the ignition system works well or not, affecting the engine performance.
Keywords: ignition system, ignition board, Ignition driver board
The issues of ignition system is a frequently problems for driver. Editor believes that
many drivers occur with the following embarrassing problems, making us feel awkward.
Problems listing
Problem 1 Ignition time of ignition system is too early
Problem 2 Ignition time of ignition system is too late
Problem 3 Spark plug failure
Problem 4 Engine tempering and blasting
Problem 5 Engine shaking
Problem 6 Engine doesn’t work
Problem 7 Loose balance for engine
Problem 8 Engine working unbalanced
Problem 9 Down power for engine
Problem 10 Consuming fuel increasing
Problem 11 Speeding increasing is bad working
Problem 12 The ignition delay time
Problem 13 The cylinder ignition failure

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The ignition system usually adopts for non-contacting ignition system for cars, Today,
Editor will summary some common problems and solutions for driver, especially for a
fresher.
A. Spark plug failure
The phenomenon Reasons
a. Spark plugs are filling with carbon electrodes and spark plugs are often
covered with a layer of very thick black and
gray powder
b. Oil stains Insulator bottom, electrodes and spark
plugs， which covers a layer of oil.
Spark plug overheating The electrodes has a gray and hard
covering
B. Ignition time of ignition system is too late

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Phenomenon Analysis and Diagnosis
Silencer sounds heavily, Tempering
occurring when driver accelerate speed,
High temperature after engine cooling, Car
runs weakly.
The angle of direction is incorrect,
adjusting the angle of ignition into
regulated angle
C. Ignition time of ignition system is too early
Phenomenon
Analysis and Diagnosis
Idle operation is not smooth, easily misfire.
The failure is mainly caused by ignition
timing misalignment or ignition angle
assembly misalignment. Please use ignition
test equipment to test, adjusting the
regulated angles.
The classification of problems
The ignition issues can be classified into 2 types according the ignition system position,
one is low voltage circuit and high voltage circuit problem.
The reasons of low voltage circuit are as following,
a. Low battery
b. Poor connection or disorder
c. The distributor or Hall sensor is damaged
d. Ignition switch is damaged or poorly connected
e. The transistor ignition control unit is damaged or poorly connected

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Low-voltage circuit fault diagnosis methods adopts ammeter or voltage meter line check
to rule out the fault.
For the aboved problems, we recommend that customer purchase .Sacer’s ignition
board. It is a high quality one. Because Sacer finishes temperature test, -20℃ to 70℃,
each product also pasts full Function OQC test and confirm every piece is qualified. So
and re-testing are professional for us. each testing means responsibility for Sacer.

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Application 4 cylinder Ignition driver board
Model Mercedes
Specification Ignition board for Mercedes VDO 4 cylinder
Description Ignition board for Mercedes HFM ECU, We
supply an conventional aftermarket
replacement board. To use Ignition Boards
you can either 1) Cut off pins 1, 2, 3 & 5
(see below) or 2) Remove the solder from
the holes on the ECM PCB and install the
Ignition Boards module without cutting the
pins It is quite safe to install the module
without removing the extra pins
Professional manufacturing+ processing + professional checking +professional
attitude+ professional service=Sacer, which means responsible for customers, even
ourselves.
Welcome to visit www.sacer-shop.com or contact with us by shop@sacer.com.cn for
more information.