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.

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HOMESERVICE MANUALSAUDI2005A4 BASE, 4D SEDAN, 3.0 TREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTENTERTAINMENT SYSTEMSCOMMUNICATION91 - COMMUNICATIONTELEMATICSSERVICE MODE, ACTIVATING/DEACTIVATINGSERVICE MODE, ACTIVATING

2005 Audi A4 Base, 4D Sedan, 3.0 T

Service mode, activating

2005 Audi A4 Base, 4D Sedan, 3.0 TSECTION Service mode, activating

Switch Telematics on.
Press button sequence "#4610#" on the Telephone Handset R37.
Confirm entry by pressing Navi button on Telephone Handset R37.

Shown on display:

Leave service mode

Service mode is activated, Battery A can be disconnected.

RENDER: 1.0x

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.