nesposito

I had my Cayenne serviced a couple weeks ago (brakes) and shortly after picking the car up I started to hear a clicking sound when the key is turned off and pulled out of the ignition. It sounds like the clicking is coming from the steering column. If I put the key back in, turn the ignition on and off and pull the key back out the clicking stops. I don't think it had anything to do with the recent service because that was only brakes and rotors. It's a 2006 Cayenne S with about 57,000 miles. Has anyone else experienced this?