ardvark

I used the "spot free rinse" for the 1st time on my Q5 this weekend, then my door lock/unlock sensors went intermittent Did some searches on hydrophobic solutions (spot free rinse) and it seems that they may be electrically conductive. Suspect that the door sensors are capacitive, so spot free rinse may put a short across them? Anyway scrubbed the rinse off the door handles, and it has not acted up since

Q5 Bob

It might vary by car wash, but the wash I use almost exclusively has a spot free cycle which I use each time, and have never had an issue with the key system. This is after nearly two years of ownership and a lot of washes.

flybooey

Have you experienced the dash alert stating there was not a key present? While the car was running and key in hand. As if you had started the car, then exited and left the key in the house.

Don Keener

Yup.... Im having that issue right now. My other key works fine... its just the key that I normally carry. Ive changed the battery but no joy. Have email into dealer service dept.

flybooey

Mine too. Keep us posted please.

Don Keener

Does your other key work OK?

My issue is just with one key. I would get the message while driving and if i was trying to start the car, it would ignore me (not good!).

Don Keener

Well... the plot thickens... My other key started with the same thing today... therefore, its the car and not the keys. I have service scheduled for next week. The dealer will come get the car and leave me a loaner. Ill let you know what happens from there...

One thing to look for when it malfunctions... there is a little red led on the key. When you press the 'start' button, does the little led on the key fob flash?? Mine does but the car still wont start sometimes.

Don Keener

Well.. my car is at the Audi dealer to work on the key issue. They brought me a brand new A6 to use as a loaner... very nice.... except its a 2.0. My TDI would eat it for lunch in town. Fingers crossed that they get it sorted out.

Don Keener

Dealer just called. They said it was a 'SW ISSUE' and they reflashed it and all is good now. We will see when I get it back....

Don Keener

Got some clarification and they 'recoded' the comfort module.. not reflashed it. Got the car back and within about 10 minutes of driving had the exact same thing happen... back to the dealer it goes.

I was able to reconfirm that it happens with either key...

Both keys have new batteries....

When I press the button to start the car one of two things happens... The led on the key flashes once and the car starts... or the LED on the key flashes multiple times and then the display says 'no key identified' and no attempt to start occurs.

Dealer has opened a 'Tech' case with Audi service.