Squeak

[merc convert]

After traveling approx 50 miles I get a squeak from the rear of the car, sounds like it maybe offside but nothing definate. It only occurs in warm weather and will come and go. Any ideas please?

Mercedes C250TD

 

[teddycatkin]

The pied piper had this same problem ?
Seriously --2 things to check subframe bushes or brakes ?

 

[merc convert]

Thought about the brakes but seems strange being weather/distance related.

 

[teddycatkin]

As with the bushes they warm up in use and with constant movement temp changes can soften bushes and heat can move a very thin or rusted backplate so it begins to just touch a moving part.
You could also have a "dry" shock absorber ? or a cracked or broken spring ?
Try bouncing it up and down on each rear corner ---or when its warm and making the noise get out and get somebody else to drive it slowly as you stand by the rear to pin point where its coming from ?

 

[merc convert]

Thanks TC I am thinking it may be more the brake problem. My description probably wasn't the best, the noise is more of a sqeal than a squeak but does come and go as speed is changed. Do you think it could be wheel bearings drying out as they warm up?

 

[teddycatkin]

no -not really wheel bearings sqealing -they sing or hum and should do it all the time find a really sooth bit of road to test--( I know thats a tall order here now ) also could be the rear propshaft bearing or diff related ?