Mercedes Forum - Mercedes Benz Enthusiast Forums - Mercedes EQC 400 Squeaking / Whistling Noise

Hi,
My Mercedes EQC 400 is not even a year old with only 10,000km on it. There is a very annoying squeaking / whistling that happens at slow speeds. It started only happening when turning to the right and usually when going slightly uphill. However as you will see from the YouTube video, its now happening even when going straight and at times when turning left.This happens both after using the car throughout the day and even just after the car has started after being parked all night.
The dealership has tried fixing it 3 times now but to be honest, nothing has been replaced...only taken apart and put back together after some cleaning/lubricant and slight adjustments. It's also not clear from which wheel this is coming from. The assumption is that it is brake related but nobody has any idea what it might be exactly.

Any ideas?
Cheers