Vehicle equipment and instruments Mercedes A-Class (W168)

General description and precautions
When checking electrical equipment, a motorist, referring to technical documentation, constantly encounters such concepts as voltage, current, resistance. Voltage is...

Additional electrical equipment — installation
Wires that need to be run in addition to existing wires, if possible, always run along separate wire harnesses, using existing clamps and rubber grommets. If necessary,...

Troubleshooting electrical equipment
When troubleshooting an electrical installation, a systematic approach is important. This applies to both checking a failed incandescent lamp and finding the reasons for...

Switches — current flow test
Most consumers of onboard electricity are turned on and off manually using a switch. In addition, there are automatic switches. These include, for example, the engine...

Relay test
Many electrical circuits incorporate relays. The switching relay works like a switch. For example, in order to turn on a consumer using a manual switch, you must...

Ignition Key and Remote Control — Replacing Batteries
1. Use a coin 1 to pry cover 2 on the remote control, which closes the battery compartment, and remove it (see illustration). 2. Remove both batteries 1 by prying them...

Opening plug connections
Attention! When disconnecting the plugs, pull not by the wire, but by the connecting block of the plug, after unlatching it or squeezing the leashes. Plugs in the engine...

Rear window heater — check
When the heated rear window is turned on, the icing or fogging of the rear window should disappear after a while. 1. Check the fuse first if the heater is not working....

Sound signal — removal and installation
Removing 1. Remove the front bumper, see relevant chapter . 2. Disconnect plug 1 and unscrew nut 2 (see illustration). 3. Remove high tone 4 and low tone 3 (see...

Fuses — Replacement
In order to avoid short circuits, damage to wiring and electrical equipment as a result of network overload, individual electrical circuits are protected by fuses with...

Locations of fuse blocks
Fuse Box No. 1 The No. 1 fuse box is located under the instrument panel in the footwell on the passenger side. 5. Lift the hinged handle of the fuse box cover latch and...

Relay — removal and installation
Relay box #1 This relay box is located with the fuse box under a cover at the bottom of the instrument panel in the footwell on the passenger side. This unit contains...

Instrument panel — removal and installation
Removing This chapter explains how to remove and install the instrument panel, various switches, and the car radio including speakers and antenna. 1. Disconnect the wire...

Steering column switches — removal and installation
The switches for the direction indicator, dipped and main beam headlights, wiper, mounted on the steering column, are the so-called combined steering column switches and...

Cigarette lighter — removal and installation
Removing 1. Disconnect the wire terminal from the negative pole of the battery «masses» (-), by turning off the ignition first. Attention! Disconnecting the battery from...

Air conditioner and heater switches — removal and installation
Removing 1. Disconnect the wire terminal from the negative pole of the battery «masses» (-), by turning off the ignition first. Attention! When the battery is...

The lower block of switches on the center console — removal and installation
This block 1 combines the switches for the washer and rear window defroster, seat heater, as well as the position switches for the outside rear-view mirrors and the ASR...

Switches on the back of the center console — removal and installation
Removing 19. Disconnect the wire terminal from the negative pole of the battery «masses» (-), by turning off the ignition first. Attention! When the battery is...

Light alarm switch — removal and installation
Removing 1. Disconnect the wire terminal from the negative pole of the battery «masses» (-), by turning off the ignition first. Attention! When the battery is...

Outside temperature sensor — removal and installation
The outside air temperature sensor is located under the front bumper on the right side. Removing 1. Disconnect the wire terminal from the negative pole of the battery...

Radio receiver — removal and installation
The radio is located in the mounting compartment on the center console. To remove the radio, you need special pullers or two templates about 0.5 mm thick. 1. Disconnect...

Speakers — removal and installation
Removing 1. Disconnect the wire terminal from the negative pole of the battery «masses» (-), by turning off the ignition first. If the radio has an access code, before...

Roof radio antenna — removal and installation
Removing 1. Disconnect the wire terminal from the negative pole of the battery «masses» (-), by turning off the ignition first. If the radio has an access code, before...