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 should, if possible, always be run along separate wire bundles, using existing clamps and rubber grommets. If...

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 cause of an...

Switches — Checking for Current Flow
Most of the onboard electrical consumers are switched on and off manually using a switch. In addition, there are automatic switches. These include, for example, the...

Checking the relay
Many electrical circuits contain relays. A switching relay works like a switch. For example, in order to turn on a consumer using a manual switch, you need to manually...

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

Disconnecting plug connections
Attention! When disconnecting the plugs, do not pull on the wire, but on the connector block of the plug, having first unlocked it or squeezed the leashes. Plugs in the...

Rear Window Defogger — Check
When you turn on the rear window heating, after a while the icing or fogging of the rear window should disappear. 1. Check the fuse first if the heater does not work. 2....

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

Fuses — replacement
To prevent short circuits, damage to wiring and electrical equipment due to network overload, individual electrical circuits are protected by fuses with fusible links....

Fuse box locations
Fuse box #1 Fuse box #1 is located under the instrument panel in the footwell on the passenger side. 5. Lift the fuse box cover latch release handle and turn the latch...

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

Instrument cluster — removal and installation
Removal This chapter provides the procedure for removing and installing the instrument cluster, various switches, and the car radio, including speakers and antenna. 1....

Steering column switches — removal and installation
The switches for the turn signal, low and high beam headlights, and windshield wipers, mounted on the steering column, are so-called combined steering column switches...

Cigarette lighter — removal and installation
Removal 1. Disconnect the ground (-) wire terminal from the negative battery terminal, after turning off the ignition. Attention! When disconnecting the battery from the...

Air Conditioner and Heater Switches — Removal and Installation
Removal 1. Disconnect the ground (-) wire terminal from the negative battery terminal, after turning off the ignition. Warning! When you disconnect the battery from the...

Lower Switch Block on the Center Console — Removal and Installation
This block 1 combines the switches for the rear window washer and heater, seat heater, as well as the switches for the position of the outside rear-view mirrors and the...

Switches on the rear of the center console — removal and installation
Removal 19. Disconnect the ground (-) wire terminal from the negative battery terminal, after turning off the ignition. Warning! When you disconnect the battery from the...

Hazard warning light switch — removal and installation
Removal 1. Disconnect the ground (-) wire terminal from the negative battery terminal, after turning off the ignition. Warning! When you disconnect the battery from the...

Outside Air Temperature Sensor — Removal and Installation
The outside air temperature sensor is located under the front bumper on the right side. Removal 1. Disconnect the ground (-) wire terminal from the negative 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 approximately 0.5 mm thick. 1....

Speakers — Removal and Installation
Removal 1. Disconnect the ground (-) wire terminal from the negative battery terminal, after turning off the ignition. If the radio has an access code, make sure that...

Roof Radio Antenna — Removal and Installation
Removal 1. Disconnect the ground (-) wire terminal from the negative battery terminal, after turning off the ignition. If the radio has an access code, make sure that...