Driver side in the instrument panel

What is your question?

My 2012 CC (157,000 miles) has been making a whining noise when accelerating on and off for a little over a month. For awhile, I thought it might be the transmission slipping, but after having taken to the transmission shop, they could find nothing apparently wrong with it. During the road test, the mechanic told me it ran just fine! Like I said, this whining comes and goes. Sometimes I won't hear this noise for a couple of weeks. The noise first started in winter, and I did notice that it tends to go away in warm/hot weather. I noticed yesterday that the noise starts to come on when the AC is off, but when I turn it on, it goes away. Any ideas on what the causes of this are? I plan to sell the car within the month, so is it safe to drive a few more weeks?

How long has your 2012 Volkswagen CC had this problem?

A month and a half2