Asking if the high pitched whine is normal for a 2016 GL 350. Doesn't start until about a minute after the engine has been started. I don't recall hearing it before. My GL has 11k miles on it.

 

I hear it but it doesn't sound unusual. Sounds like some sort of vaccum pump or Airmatic. Do you hear it when you finish driving? I can try mine but I need to know if you have your AC -Heat/Cool on.

 

AC was not on. I did have the fan blowing regular air. It was still making the noise when I completed my drive. I turned the car off and turned it back on and it started again after about one minute and the sound came back. Thanks for checking!!

 

It seems to be just turbo whine. I don't think it's anything negative. FYI, I just tried it, 2013 GL350.

 

Thank you!!