Vibration noise coming from under rear OS passenger seat

[Steveamg]

W213
2016 E220d

When revs are approx 1500k i can hear a vibration of some sort in the cabin - pretty annoying to be honest!

I have placed my head down in the OS rear footwell and the noise is 100% coming from that area.
Happens if the car is in D or N.
Very much a vibration noise than a mechanical.

Planning to get car on a ramp and take the trays off to see what it is... in the meantime does any one have a clue what it could be?

 

[Vinylhead]

W213
2016 E220d

When revs are approx 1500k i can hear a vibration of some sort in the cabin - pretty annoying to be honest!

I have placed my head down in the OS rear footwell and the noise is 100% coming from that area.
Happens if the car is in D or N.
Very much a vibration noise than a mechanical.

Planning to get car on a ramp and take the trays off to see what it is... in the meantime does any one have a clue what it could be?

I had something similar and found it was one of my undertrays was touching the exhaust.

 

[Steveamg]

I had something similar and found it was one of my undertrays was touching the exhaust.

Hoping it is going to be something simple and easy as that.

tray, exhaust clamp etc

Will report back once I’ve got it on the ramp.
Thanks for the reply.

 

[DSM10000]

Hope it's at 1500 rpm and not 1500k!