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manuals for the latest information.******** Audi A4 Quattro Sedan (8K2) L4-2.0L Turbo (CAEB) Technical DIAGNOSIS AND REPAIR # 910842 Date: 080915


Audio System - Buzz/Hum/Hiss From Speakers



91 08 42



2018701/1



September 15, 2008



Vehicle Information



Radio reception and playback problems



Condition



The customer may report constant sound interference in the radio. The sound may be distorted, or a humming or hissing noise may be audible in all



speakers.



Technical Background



If the reception level is good, the problem may be caused by aftermarket equipment that is plugged into the cigarette lighter or one of the power



outlets. Insufficient radio interference suppression of rechargers and power supply units of mobile telephones, navigation systems and other



electronic devices may cause voltage interference in the on-board network.



Audi A4 Quattro Sedan (8K2) L4-2.0L Turbo (CAEB) Page 478



Production Solution



Not applicable.



Service



1. Verify if aftermarket devices were installed in the vehicle.



2. Disconnect the aftermarket devices, if applicable.



3. Inform the customer if the interference disappears after removal of a plugged-in aftermarket device.



Warranty



This TSB is informational only and not applicable to any Audi warranty.



Additional Information



All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service