2009 Audi A4 - strange noise on opening front door

If it is cold enough the mechanism could be frozen. If not the actuator is gone and will need to be replaced.

Pull the trunk wall lining back by the fuel filler. On my 99 A4 there is a red cable there - it's an emergency release that will pop the gas door open.

can you hear the motor trying to work the window? A fairly common problem is the window regulator breaks. this is the cable operated lifting mechanism that raises the window, when it breaks you can hear the motor winding away, accompanied by a faint clunking noise as the motor tries to operate the mechanism. They are quite difficult to replace.
if you cant hear the motor working (also assuming all your other windows do work) then either to motor is faulty or there is no power to the motor. the wiring inside the rubber boot that goes from the car to the door (by the door hinges) is prone to breaking due to the constant flexing back and fourth as the door is opened and closed. switches can also fail, you may be able to swap the drivers/passengers switches around if they are identical for testing.

I dont think this is a problem. I have the same noise when openning the doors on my 2009 1.8t a4, u might also get this sound when you open the trunk as well. this is probably a manufacturing thing. it could be that the car senses that the door are open so that it would prepare the on board computer for ignition or something of that sort... thats my guess though!! but i believe its normal

hi, ive had 2 A 4's, could you describe in a little more detail what the noise is like, and when it happens...I,E, how far open is the door, and does it happen on closure too..???

it is more than likely the drivers door latch assembly

Hi this could be one of two problems could be the drivers door catch/latch in the door cheapest one or the dash panel itself costly job

Enter car from left rear behind the driver and see if you can manually unlock it from the inside. Then use remote to test it.

Hi i have an audi a4 and the drivers window fails to open and close properly and there is a strange clicking when doing so. It sounds like there is a stone inside the window but i think it may be a mechanical fault with the electic window ........help