Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Transmitted Output, Possible Installation Locations
Volkswagen permits the installation and operation of radio units, as long as the transmitted power on antenna base, listed in table, is not exceeded. For prescribed antenna locations see table.
Limit according to VDE 0848, part 2 (maximum permissible field intensity to protect persons) must be maintained even, if necessary, through reduction of transmission output.
Voltage Supply
When retrofitting transmitter/receiver unit in the vehicle, the battery is used to connect the positive and negative wire.
The wiring harness must be manufactured additionally:
- Voltage supply positive via read wire, 2.5 mm2 cross section.
- Voltage supply negative via brown wire, 2.5 mm2 cross section.
The positive wire must have a fuse which must be located very close to the battery. Therefore, a fuse panel must be secured next to battery. Both wires must be encased in an insulating hose.
suitable connections must be attached on battery side.
Proceed on unit side according to operating instructions.
The additional wiring harness must be routed separately from vehicle wiring, distance must be at least 10 cm.
For some telephone systems and radio communication units an additional terminal 15 (ignition) is necessary. Then, a black wire connection of 1.5 mm2 cross section must be connected from transmitter/receiver unit to terminal 15a. Refer to SYSTEM WIRING DIAGRAM.
When installing, make sure wiring connections are not routed parallel to standard wiring.
Antenna and Wiring
A shielded wire must be used between transmitter/receiver unit and antenna. Shielding must be grounded to unit and antenna.
At the same time, make sure ground connection of antenna base wire to vehicle body is correct and continuous.
The transmitting system must only be used when shielded to avoid interference in antenna wiring. To ensure the system it is tuned and operating correctly it is recommended that an output/performance check is carried out.
Other Auxiliary Installations
Voltage supply must also be routed via separate wiring set and secured by fuse.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.