Humming Sound
Thread Starter
Newbie
Joined: Feb 2004
Posts: 11
Likes: 0
From: Canada
Humming Sound
Help ..! Humming Sound
I was driving on the highway my 1993, 300E, and noticed a humming sound that never ended. I was thinking that it was a truck driving next to me, but when I looked around, there were no cars or trucks.
The noise comes from my car, it comes and goes. It may happen between (80 –120 km/h) or (50 mph-75mph).
What could be causing the noise?
PS: Current mileage: 72000 miles (115000 Kms)
Thanks,
I was driving on the highway my 1993, 300E, and noticed a humming sound that never ended. I was thinking that it was a truck driving next to me, but when I looked around, there were no cars or trucks.
The noise comes from my car, it comes and goes. It may happen between (80 –120 km/h) or (50 mph-75mph).
What could be causing the noise?
PS: Current mileage: 72000 miles (115000 Kms)
Thanks,
MBWorld Fanatic!
Joined: Aug 2002
Posts: 1,005
Likes: 33
From: Germany
'00 S320 W220, '98 A160 W168/ sold in 2005 '86 260 E W124 '90 260E W124
check the cover underneath the engine, maybe it became loose, and starts vibrating at higher speeds. Check the tires for bubbles in the side walls. Check the transmission alignment with the drive shaft. Check the flex disks of the drive shaft.
Member
Joined: May 2003
Posts: 173
Likes: 0
From: NorCal
Mercedes-Benz 400E
Right now on my car I my smog pump bearing is going out and it's pretty loud. With the hood closed it sounds like a large amount of air is being forced through a small opening, like somethings blocking the fan. With the hood open the sound can be linked to the smog pump.
If you can try to locate the sound you might be surprised what's causing it.
If you can try to locate the sound you might be surprised what's causing it.
Thread Starter
Newbie
Joined: Feb 2004
Posts: 11
Likes: 0
From: Canada
Still have not found what the problem is. It seems to come from the rear part of the car. I'll check the differential fluid tonight, I believe this is not the problem since I put new fluid last year, and it doesn't drip.
I took a look underneath, and how do I:
1) Check the transmission alignment with the drive shaft., and
2) Check the flex disks of the drive shaft.
What should I look for. Everything seems to be normal.
Thanks
PS: The sound may start at 70 km/h, and increase/decrease it's sound frequency as the speed goes increases/decreases. I even put it in neutral on the highway, and the noise continued.
I took a look underneath, and how do I:
1) Check the transmission alignment with the drive shaft., and
2) Check the flex disks of the drive shaft.
What should I look for. Everything seems to be normal.
Thanks
PS: The sound may start at 70 km/h, and increase/decrease it's sound frequency as the speed goes increases/decreases. I even put it in neutral on the highway, and the noise continued.
