190E braking question.

[drainaudio]

Hi all,
have a question relating to the brakes on my 190E.
It feels as though they are working fine, very smooth, very responsive, stop very quick in a very straight line. What seems to be maybe slightly out of the ordinary though is that up to speeds of 60Mph whether I apply the brakes soft or hard all is smooth, if I'm however doing 80Mph and brake with medium pressure I suddenly seem to have a huge increase in road/tyre noise - I would almost say a vibration only there is no vibration the brakes are still very smooth, just suddenly a significant noise increase. If I brake hard or soft no problem, it only seems to happen when applying medium pressure. I have new Continental Premium Contact tyres and they seem to have quite a hard compound as I can always feel a significant diffenence between road surfaces. In terms of the car sitting on the road it is super quiet and smooth, so I can't see a problem there.
Any ideas, maybe this is normal for the 190E braking system?
Thanks, Geoff Kakoschke.

 

[nicky]

Hi all,
have a question relating to the brakes on my 190E.
It feels as though they are working fine, very smooth, very responsive, stop very quick in a very straight line. What seems to be maybe slightly out of the ordinary though is that up to speeds of 60Mph whether I apply the brakes soft or hard all is smooth, if I'm however doing 80Mph and brake with medium pressure I suddenly seem to have a huge increase in road/tyre noise - I would almost say a vibration only there is no vibration the brakes are still very smooth, just suddenly a significant noise increase. If I brake hard or soft no problem, it only seems to happen when applying medium pressure. I have new Continental Premium Contact tyres and they seem to have quite a hard compound as I can always feel a significant diffenence between road surfaces. In terms of the car sitting on the road it is super quiet and smooth, so I can't see a problem there.
Any ideas, maybe this is normal for the 190E braking system?
Thanks, Geoff Kakoschke.

Only thing i can see happening here is that you are making more road contact with the tyres under heavy braking,this would change the road noise....

 

[jimsinessex]

I agree with Nicky. You say that the tyres are new so the tread blocks are deeper and will will move more under load. Noise is a vibration and will be speed related.

My tyres (not the same make as yours) become noticeably more noisy when between half and three-quarters worn. Worried me at first but I live with it now I know it is only a tyre wear issue and not something mechanical sending me warning signals.

Jim