Merserybenze

I get a whining noise from the rear passenger cabin. It’s only noticeable when the temperature outside drops below 50’ish. Noticeable when in 4th or above but most notable in 4th. Can replicate in both D or Manual mode. Anyone experiencing this or have an idea what it might be? Not tires as these have replaced a few times. 2018 S450 4Matic with 48k. Thx.

Plutoe

put the car on a lift and search for similar sounds