Shaking when brakes are hot
Thread Starter
Newbie
Joined: Jan 2022
Posts: 2
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GL 350 BlueTec
Shaking when brakes are hot
I have a 2015 350 BlueTec. I have noticed that on longer drives, especially downhill, when a lot of braking is used, the car shakes when brakes applied. This doesn't happen on shorter drives. At the last tire rotation I asked the mechanic if slotted/drilled rotors wouldn't have this issue, and I was told maybe. Tires are rotated and balanced regularly. No other driving issue. Drives in a straight line.
Super Member
Joined: Jul 2019
Posts: 733
Likes: 298
From: New Orleans
2014 GL450, 1992 W140 300SD, 1993 W140 300SE, 1987 E30 Convertible
Car shakes because you bake outer layer of braking pads to brake rotor. The rule of thumb is to use engine braking in lower gear then you go downhill
Junior Member
Joined: Feb 2021
Posts: 28
Likes: 4
GL350
I have a 2015 350 BlueTec. I have noticed that on longer drives, especially downhill, when a lot of braking is used, the car shakes when brakes applied. This doesn't happen on shorter drives. At the last tire rotation I asked the mechanic if slotted/drilled rotors wouldn't have this issue, and I was told maybe. Tires are rotated and balanced regularly. No other driving issue. Drives in a straight line.
Cheers
Out Of Control!!
Joined: Sep 2018
Posts: 14,695
Likes: 4,587
From: unbegrenzt
2017 GLE350 4MATIC
To avoid warping rotors in the future, use engine braking on long downhill descents. Only when necessary apply the brakes, and apply them rather sharply and for a short time to reduce the vehicle speed below the prevailing traffic speed. Then let gravity and engine braking take over again.
