SoCalB7

I just had a look at the NHTSA website for TSB's, and as it turns out, there have been several TSB's issued, including many about issues that have been reported here, such as adaptive lighting and cold start problems, as well as the well-known issues with the electronic remote key.

The 2006 model includes two TSB's. The 2005 model year lists 20 TSB's, but several of these may apply only to B6's. In both cases, some may apply only to specific drivetrain or option packages.

If you've been having any issues, you might want to first have a look at this list to see if anything here applies to you. For more details, click the link to the NHTSA website.
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Model year 2006 TSB's --

Service Bulletin Num : 0507 Date of Bulletin: DEC 23, 2005
NHTSA Item Number: 10018784
Component: EQUIPMENT ADAPTIVE
Summary: ADAPTIVE LIGHTING, HEADLIGHT RANGE CONTROL WARNING IS ON IN DRIVER INFORMATION DISPLAY. *TT

Service Bulletin Num : 0506 Date of Bulletin: NOV 07, 2005
NHTSA Item Number: 10018309
Component: ENGINE AND ENGINE COOLING:ENGINE
Summary: ECM UPDATE FOR MALFUNCTION INDICATION LIGHT ON CONDITION, POSSIBLE DIAGNOSTIC CODE P2106(18538). *TS

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Model year 2005 TSB's --

Service Bulletin Num : 0507 Date of Bulletin: DEC 23, 2005
NHTSA Item Number: 10018784
Component: EQUIPMENT ADAPTIVE
Summary: ADAPTIVE LIGHTING, HEADLIGHT RANGE CONTROL WARNING IS ON IN DRIVER INFORMATION DISPLAY. *TT

Service Bulletin Num : 0507 Date of Bulletin: NOV 21, 2005
NHTSA Item Number: 10018427
Component: ENGINE AND ENGINE COOLING
Summary: SPORADICALLY AFTER COLD START, ENGINE MAY RUN SLIGHTLY ROUGH FOR A FEW SECONDS AND THE MALFUNCTION INDICATOR LAMP MAY ILLUMINATE WITH ONLY MISFIRE DIAGNOSTIC TROUBLE CODES (DTC) (P0300, P0301, P0302, P0303, P0304) STORED IN DTC MEMORY. *TT

Service Bulletin Num : 0501 Date of Bulletin: NOV 16, 2005
NHTSA Item Number: 10018223
Component: ELECTRICAL SYSTEM
Summary: LIGHT SENSOR WARNING LIGHT ON INTERMITTENTLY AND CUSTOMER CONCERN ABOUT AUTOMATIC HEADLIGHT INSTRUMENT CLUSTER WARNING LIGHT ILLUMINATING FOR 1 SECOND ACCOMPANIED WITH A SHORT BEEP. *TT

Service Bulletin Num : 0505 Date of Bulletin: NOV 03, 2005
NHTSA Item Number: 10018431
Component: ELECTRICAL SYSTEM
Summary: MALFUNCTION INDICATOR LAMP (MIL) MAY BE ILLUMINATED. DIAGNOSTIC TROUBLE CODE (DTC) P2106 (18538) THROTTLE ACTUATOR CONTROL SYSTEM - FORCED LIMITED POWER MAY BE PRESENT. *TT

Service Bulletin Num : 0505 Date of Bulletin: OCT 28, 2005
NHTSA Item Number: 10018227
Component: ENGINE AND ENGINE COOLING
Summary: ENGINE STUMBLES AFTER COLD START / WARM ENGINE MAY ATTEMPT TO STALL IN IDLE WHEN ENGAGING GEAR WITH VEHICLE STATIONARY.

Service Bulletin Num : 0402 Date of Bulletin: JUL 26, 2005
NHTSA Item Number: 10015982
Component: ENGINE AND ENGINE COOLING:ENGINE
Summary: ENGINE OIL SPECIFICATIONS, OIL CAPACITY, OIL FILTER. TO INCLUDE AUDI 24 2006. *TT
Service Bulletin Num : 0409 Date of Bulletin: MAY 24, 2005
NHTSA Item Number: 10010830
Component: ENGINE AND ENGINE COOLING:ENGINE
Summary: ENGINE SLIGHTLY STUMBLES AT SLOW INITIAL ACCELERATION AFTER COLD START. *TT

Service Bulletin Num : 190504 Date of Bulletin: MAY 16, 2005
NHTSA Item Number: 10015583
Component: ENGINE AND ENGINE COOLING
Summary: THE COOLANT RESERVOIR IS DIAGNOSED TO BE LEAKING AND INTENDED TO BE REPLACED. *TT

Service Bulletin Num : 570502 Date of Bulletin: MAY 03, 2005
NHTSA Item Number: 10015581
Component: EQUIPMENT:ELECTRICAL
Summary: REMOTE TRANSMITTER KEY INOPERABLE. AUDI 2005 A4, S4 SEDAN AND AVANT. *TT

Service Bulletin Num : 0501 Date of Bulletin: APR 12, 2005
NHTSA Item Number: 10015098
Component: FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS
Summary: FUEL INJECTORS, UNNECESSARY REPLACEMENT. UPDATE. *TT

Service Bulletin Num : 0501 Date of Bulletin: APR 11, 2005
NHTSA Item Number: 10015100
Component: ENGINE AND ENGINE COOLING
Summary: FUEL INJECTORS UNNECESSARY REPLACEMENT. *EH

Service Bulletin Num : 0502 Date of Bulletin: APR 11, 2005
NHTSA Item Number: 10015102
Component: ENGINE AND ENGINE COOLING
Summary: FUEL INJECTORS UNNECESSARY REPLACEMENT. *EH

Service Bulletin Num : 0503 Date of Bulletin: APR 08, 2005
NHTSA Item Number: 10015099
Component: ENGINE AND ENGINE COOLING:COOLING SYSTEM
Summary: COOLANT LEAK OR ON HEAT IN PASSENGER COMPARTMENT. *EH

Service Bulletin Num : 0504 Date of Bulletin: MAR 31, 2005
NHTSA Item Number: 10016565
Component: AIR BAGS
Summary: AIRBAG LAMP ON, UPPER LIMIT OF SIDE AIRBAG EXCEEDED. TO INCLUDE A4 2006. *TT

Service Bulletin Num : 240501 Date of Bulletin: FEB 15, 2005
NHTSA Item Number: 10012766
Component: FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS
Summary: FUEL INJECTORS, UNNECESSARY REPLACEMENT. *TT

Service Bulletin Num : 0501 Date of Bulletin: FEB 14, 2005
NHTSA Item Number: 10012810
Component: ELECTRICAL SYSTEM
Summary: TRANSPORT MODE DEACTIVATING WHEN VEHICLE ARRIVES AT THE DEALERSHIP. *EH

Service Bulletin Num : 0502 Date of Bulletin: FEB 14, 2005
NHTSA Item Number: 10012811
Component: ELECTRICAL SYSTEM
Summary: VARIOUS CONTROL MODULES WITH SPORADIC DIAGNOSTIC TROUBLE CODES STORED IN DTC MEMORY. *EH

Service Bulletin Num : 910501 Date of Bulletin: FEB 04, 2005
NHTSA Item Number: 10012769
Component: EQUIPMENT:ELECTRICAL
Summary: SATELLITE RADIO -R146-, INTERFERENCE WITH TIRE PRESSURE MONITORING SYSTEM OR AUDI NAVIGATION PLUS. *TT

Service Bulletin Num : 480501 Date of Bulletin: FEB 03, 2005
NHTSA Item Number: 10012767
Component: STEERING:HYDRAULIC POWER ASSIST SYSTEM
Summary: POWER STEERING, NOISY. TO INCLUDE 2006 MODELS. *TT