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Robert
Robert, UK Qualified Car Technician
Category: Car
Satisfied Customers: 4563
Experience:  Fully qualified / self employed garage technician in the UK
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Mercedes A class 160 auto reg. year 2003 28000 miles only.

Resolved Question:

Mercedes A class 160 auto reg. year 2003 28000 miles only. Have slight motion noise between 40/50 mph from N/S/R wheel. (Only way to describe it) it's not loud. What moving parts are located in this assembly, is bearing wearing, does not sound like a brake pad binding. Has any other A class had similar problem.
Submitted: 2 years ago.
Category: Car
Expert:  Robert replied 2 years ago.

Hi..

Hopefully i can help..

Generally with wheel bearing failures.you will have the noise of humming which changes with speed.usually louder as you speed up depending on the severity of the wear..another way is monitor /feel over the cente of the wheel.if really hot?then that can be sign too.another is to jack up that side until the wheel is just of the ground,make sure cars in neutral/handbrake fully on and spin the wheel by hand and listen for a rummbling/grateing noise.also take the wheel at the 12-6 o'clock position and feel for any up and down movement from the cente hub another sign that the bearings have worn..typically bearings always start off with a low humming noise until they gradually wear and the noise become excess to the point you will find that the noise will start to change pitch as you corner or brake even..also too check your tyre condition/psi aswell as especially so the treads as uneven treads or tyre balding can produce a similar noise..apart from that then next obvious area if the bearing/tyre is found to be ok..is inspection of the pads/disc aswell as anything coming into contact with the back plate..but as above and as your description goes you may right in the sense the wheel bearing is probably most likely wearing..you would need to verfiy that as above before going ahead with any replacement..I do hope this helps..if you need to ask anything else or include anything further then just continue before you rate

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Customer: replied 2 years ago.
Thanks I thought as your answer states is the next best step
Expert:  Robert replied 2 years ago.

Hi..there thanks for your responce..

No problem glad to help..if you require to ask anything else or advice even then just continue if need be..in the mean time please dont forget to rate my assistance above which is always appreciated..regards Robert

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