A3 heated door mirror not working - 2005 Audi A3

REMOVE THE MIRROR FROM THE BASE UNSCREW THE 2 TORX10 SCREWS AND REMOVE THE COVER DETACH THE BLINKER FROM THE COVER.ASSEMBLE IN OPPOSITE ORDER U REMOVED

Could have a DDS an PDS .depends on what RPO code yours has >
Outside Mirror Description and Operation (with RPO DL3)
Or
Outside Mirror Description and Operation (without RPO DL3)
Without
Heated Outside Rearview Mirror Operation
The REAR DEFOG relay controls the operation of the heated outside rearview mirrors. When rear window defogging is requested, the REAR DEFOG relay is energized and B+ is applied to the supply voltage circuit of the mirror heater element, located in the mirror face. A constant ground is also applied to the mirror face. Current will pass through the mirror heater element, warming the mirror, so long as the rear window defogger is commanded ON.

With
Heated Outside Rearview Mirror
The DDS and PDS control the activation of the mirror heaters. Upon receiving a serial data message indicating a request for heated mirrors, the DDS and PDS, will apply voltage to the mirror heater element supply voltage circuit. The mirror heaters will remain active until a new message is received indicating rear defogger is to be deactivated.
The power mirror system consists of the following components:
• Driver Door Switch (DDS)--An electronic control module with integrated switches and requires programming when replaced
• Passenger Door Switch (PDS)--An electronic control module with integrated switches, requires programming when replaced
• Power Mirror Direction Switch--Integrated into DDS and is a four position momentary switch that provides a signal input to the DDS for up, down, left/extend and right/retract with a mirror switch activation
• Mirror Select Switch--Integrated into DDS and is a three position switch that allows the operator to select the left or right mirror and also a neutral/fold position
• Mirror Extend/Retract Switch--Integrated into DDS and is a two position switch that allows the operator to select the mirror extend or mirror retract position
• Left Outside Power Mirror--Contains both the vertical and horizontal mirror motors
• Right Outside Power Mirror--Contains both the vertical and horizontal mirror motors
• Body Control Module--An electronic control module that requires programming when replaced, serves as the power mode master and is the main message handler
• Horizontal and Vertical Position Sensors, if equipped with memory mirrors--Supplied a 5-volt and low reference by the DDS/PDS and provide a variable voltage signal to the DDS/PDS that is proportional to mirror position
• Folding Mirror Motor, in each of the outside mirrors, if equipped with power fold mirrors--Provides extend and retract movements of the mirror and is serviced as a complete mirror assembly
Your best bet mite be to take to a qualified repair shop , i really don't think you'll be able to do anything with it.
Do you have wiring diagrams so you know which wires to test ,do you know how to do electrical testing ?
The Driver Door Switch (DDS) and Passenger Door Switch (PDS) supply voltage to the outside rearview mirror heater elements upon receipt of a serial data message from the HVAC module indicating that the rear defrost system is active. The door switch supplies B+ through the driver/passenger mirror heating element supply voltage circuit when a request is seen. Ground is applied through the driver/passenger mirror heating low reference circuit.

You don't say where you are location wise but;

You can buy the heated door mirrors in the UK for about £100 sterling each painted. Thats about US$160 each

Then you have to fit and wire them up.

Looks like £250 Total DIY (US$400) . More if you have it done in an auto shop.

Sounds like you have a fuse that may have blown if none of the mirror/window heating is working. I would check your fuses and see if that is your problem. Good luck!

Heated mirrors usually have a symbol on them -- a small diagram showing squigley heat lines.

If you don't see this, it's probably not heated. But when you take the mirror off, if it's heated it'll have wires connected to the back.

Yes, you can replace a heated mirror with non-heated -- just leave the wires tucked out of the way when you install the new mirror.

Yes, in your case they do make a heated mirror, the only difference is a heated grid on the back of the mirror (like a big electrical sticker) the problem you will have is you need to run power through the door into the mirror head to plug the mirror in. if you have power mirrors you may already have the power wires there, just not the heated mirror option. see www.burnoinc.com you should find most of your answers there.
hope this helps.

Exterior Mirror Removal and Installation
NOTE: Aero mirror shown, dual arm similar.
Manual mirrors

1. Remove the mirror sail cover to gain access to the exterior mirror retaining nuts.

Power exterior mirrors

1. Remove the front door trim panel. For additional information, refer to Section 501-05 .

1. If equipped, remove the front door speaker.

1. Remove the front door watershield.

All exterior mirrors

1. Remove the rubber plugs and dust shield.

Power exterior mirrors

1. Disconnect the electrical connector(s).
   1. Disconnect the power exterior mirror electrical connector.
   1. If equipped, disconnect the heated exterior mirror connector.

All exterior mirrors

1. Remove the nuts and remove the exterior mirror.

1. To install, reverse the removal procedure.

change whole unit ,heater element burnt out by sound of it,try removing plastic cover on inside of door behind the mirror and you should see the connections,but iam sure heater element is U/S

no car should have wind noise complain back to the dealer where you bought it and tell them the problem and dont let them make a fool out of you and see if its fixed if not dont stop complaing till its fixed and to ur satsfaction they shouldnt of went near the door if there was noting wrong with it its like the saying "IF IT AINT BROKE DON'T FIX IT" so complain back to the main dearler where you bought untill your happy with the car, but rightly you should of complained about the car the first day u got but try and see anyway