The disadvantage of these schemes is the need to constantly turn pages to find the necessary intermediate connection.
Construction of electrical circuits
The wiring diagrams are shown schematically.
Wiring diagrams of a Mercedes car
The authors have chosen at their own discretion the most commonly used schemes. Anyone who wants to get a complete set of diagrams can be advised to contact a Mercedes car dealer and order a kit.
Current supply
At the top of the diagram is usually represented «positive» group. Here the current comes from the fuse, for which the designation of the contacts, number and nominal value are indicated.
Circuit breakers
With letter designation «F» and the subsequent digital designation in the diagram in their contacts shows the fuses. The numbering corresponds to their placement in the fuse and relay boxes.
Wires
For wires, the designations of their cross section are given.
Connectors are usually marked on the diagram with the letter «X». The following numerical designation allows you to determine from the table where this connection is located in the car.
Details
All parts have an alphabetic and subsequent numerical designation on the diagrams. So, for example, the letter «A» denotes instruments, receivers, transmitters; «IN» — sensors, temperature sensors; «E» - lamps; «F» - circuit breakers; «G» — current sources; «H» - signaling devices; «K» - relay; «L» — coils, inductive sensors; «M» - electric motors; «N» - control units; «R» - resistors; «S» - switches; «T» - ignition coils; «W» - contacts «masses»; «X» - contact connectors; «Y» - valves; «Z» - solder points in the wiring harness.
Symbols
Accepted symbols are used to designate parts, while the position of all switches and contacts is shown with a stationary closed vehicle with the parking brake applied.
Contact designations. One- or two-digit numerical designations similar to those indicated in the diagrams in the diagram, if necessary with additional letters, can be found on the connection contacts of the corresponding parts.
Weight
Body parts, engine and gearbox parts in electrical equipment serve to close the electrical circuit and are called «weight». In the diagrams, each contact «masses» marked with a letter «W».
Differences of modifications
The diagrams also show the differences depending on the modification and configuration. Details are enclosed in a dotted frame and are indicated by the abbreviation (see list of abbreviations). The wiring is not shown in full. If you have found a configuration option for your car, you need to move it under the symbol of the interrupted wiring in the image and establish the connection in this way.