SL280 squeak noise rear wheels increases and decreases with speed of car.

[thomas wright]

I have a rotational squeaky noise from the rear wheels . It's frequently increases  then decreases with the speed of the vehicle.
I thought it might have been the discs or hand break but the sound continues when I apply both.  I wondered if it might be wheels bearing or something in the axel gearbox.
I would appreciate any suggestions from any experienced member.

Thank you

Tom.   ( in England)

[Charles 230SL]

hi Tom, I had a similar "squeak" several years back; ended up being the rear universal joint. vr,,,chas

[Alex D]

Hi, I have the same issue as described. Rear brakes checked out ok. Currently having the drive shaft rebalanced and new u joints installed next week, will see if this fixes it like Charles. If drive shaft and u joint don't fix then trail arm bushings. 

[Cees Klumper]

Maybe one of the backing plates that is touching the brake disk. Or a small stone caught between the disk and the plate.

[thomas wright]

Thank Charles,  I didn't  think of that as the cause but I will definitely consider it.

Many thanks,

Tom

[thomas wright]

Hi Alex
It seems from what you say it can be difficult to pin point the problem and could result in unnecessary work until you find a cure. I haven't facilities to do the work myself so use a local SL experienced engineer which can ramp up the cost unfortunately.  I have scheduled to deliver the car to them next Tuesday for a fault-find mission and will let you know the outcome.

Regards,

Tom

[Alex D]

Hi Tom,

These are things I needed to do regardless of the squeaking, initially it looks like the rear breaks are fine, rebalanced drive shaft with new u joints next week and by mid/end of March will have new trail arm bushings.  Will let you know what I find. 

If anyone else has any suggestions I am willing to listen and try.

Alex