1. Introduction

This manual was formed with the purpose to help the owner of the car to receive from it the maximum return. Performance of this task is reached in several ways. The Management included descriptions of the principles of functioning in the greatest measure of the interesting owners of vehicles of knots and systems of the car, and also the description of procedures of obligatory routine maintenance of the car and the schedule of their performance is provided. Besides, information on performing diagnostics of malfunctions of knots and systems of the car (in case of their refusal), and also ways of elimination of their reasons is offered.


The present manual is a grant on maintenance and car repairs of "Mercedes" of the W 123 series (factory designation of a series — body model): the models "200", "230", "230E", "250", "280", "280E" with a body the sedan; the models "200T", "230T", "230TE", "250T", "280TE" with a body the versatile person; the models "230C", "230CE", "280C", "280CE" with a compartment body. On cars of the W 123 series were established four - and six-cylinder petrol engines  of models M 102, M 110, M 115 and M 123.

Engines  of models M 102, M 115, M 123 have one verkhneraspolozhenny camshaft (SOHC), and the engine of model M 110 has two verkhneraspolozhenny camshafts (DOHC). Many knots and elements of engines are substantially unified.

The management is intended for employees of the centers, service stations of iremontny workshops, and also for technically prepared motorists. At all seeming complexity the design of the car is rather simple therefore in some cases the device of systems, mechanisms and units is stated without excessive specification, an aporyadok of maintenance and repair it becomes easy clear when reading the text and studying drawings and does not represent for the motorist of special problems.

Instructions for use Management

The management is divided into Chapters. Each Chapter is broken into sections. Sections, in turn, break into subsections and where it is required, on under - subsections also consist of paragraphs.

The text brought to your attention is followed by explanatory illustrations.

The description once of the procedures mentioned in the text usually the second time does not repeat. Instead a reference to appropriate section (subsection, etc.) is in case of need made where this procedure already met.

References to the provision of knot or component at the left or on the right on the car are based on the assumption that the reader is in the driver's place face forward.

Descriptions in this manual are stated in a simple and available form. If accurately to follow the recommendations provided in the text and on accompanying illustrations, no special difficulties when performing objectives should arise.

It is necessary to pay due attention to observance of technical parameters and requirements imposed to the moments of tightening of threaded connections reduced in the sections "Design and Technical Parameters" and placed at the beginning of each Chapter. It is necessary to be guided by these specifications when performing all works. In separate sections the necessary sizes and values for adjustment are given not always.

Simple operations as, for example, "to open a cowl" or "to weaken nuts of fastening of a wheel" are meant as self-evident and also are mentioned not always.

On the contrary, in the text the most difficult are in detail described and demanding the increased accuracy at implementation of the procedure.