Fault Code Manual for Mercedes-Benz

This book is designed to help you in the basic diagnostic procedures for Mercedes Benz.
It is intended to be a starting point in the diagnostic process and is not intended to be a complete
resource.
THE DIAGNOSTIC PROCESS
The diagnostic process divides itself into several levels; Information Gathering, Analysis of Codes, Testing and then
Repair. W e will cover Information Gathering and Analysis of codes in this book.
For those experienced in diagnostics jump to page
INFORMATION GATHERING
The information gathering stage always starts with the Customer.
Step 1
The Customer Interview
This is truly an art.
It consists of getting the Customer to tell you what the complaint is and under what conditions it occurs.
The customer of course is, as always, the “MOST HELPFUL” source of information. Their concise insight into the
problem is a valuable step in getting the problem solved and the car back on the road. Also it’s the most fun part of
the diagnostic process. W atching the customer use body gestures, make funny faces and funny sounds in an attempt
to imitate vehicle noises can really brighten your day.
Actually the process of getting the information out of the customer can be relatively painless if you ask the correct
questions.

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