CL500 Rear end noise

[alibali]

Had my 2002 CL500 for about a year and a half now. over the last couple of months there has been a low rumbling sound coming from the rear of the car. Had Merc do a health check and they said the bearings were all ok they did not run it on the road. I replaced the rear diff (second hand) the noise is not as loud but it's still there. Anybody out there any ideas??

 

[developer]

How are the tyres - if they aren't staggered sizes you could rotate them round and see if the noise moves.

Welcome BTW.

 

[Adam230K]

wheel bearings, or tyres.

Can you isolate the noise to one side?

 

[David-J]

Tyres, tyres, tyres.......
Had exactly the same noise issue with a set of Michelins,
The noise / rumble was consistent under accelleration / braking, which eliminated the diff', also no change on cornering but I was absolutely convinced it was the bearings. Purchased a new set of bearings but luckily the mechanic did the decent thing & called me before he fitted them. With the wheels in the air, we span them by hand and the inner face / shoulder was "lumpy" is the best way to put it.
I put a couple of "cheap" (£75 each) skins on & hey-presto - all the noise was gone.

 

[Palfrem]

The only noise from the rear end of my CL500 was a V8 burble

 

[alibali]

Thanks John ......Unfortunatly they are staggered and the tread is still good on them about 5mm on both. All of the wheel have been re-balanced just in case but to no avail

 

[alibali]

Thanks for your reply David see answer to John above. Is there a bearing in the prop shaft of the CL ?