High pitched whistle

Nobes

New member
Hi folks, I have a 2015 SWB/high roof. Took it up to Brissy and back (~100k each way) yesterday, and noticed an intermittent whistle that each time lasted about 20 seconds, probably 10-15 mins apart. Sounded to me like it was coming from the rear of the vehicle. We were doing 100 kmh at the time on cruise control. Weren’t braking, so couldn’t be that. Anyone else noticed anything similar?
 

JG2000

?? 2015 Mercedes Sprinter 416CDI MWB 2.1L BlueTec
I have a weird hum from the rear/middle of the van only when doing 80-100kms. Im thinking of diff/wheel bearings. Haven't worked it out yet. Will be replacing diff fluid tomorrow and hopefully it goes away.
 

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