a4 59 reg saloon

[Good looking bill]

hi all. I have recently brought my lovely car.but i have a problem with the drivers door. I have set the door to on through mmi.but it still is intermittent some times it opens on the fob other times I have to lock unlock to get it to work. any thoughts please 

[Steve Q]

It could be the driver's door mechanism failing. I had this on my a6.