Rolling down hill - MBWorld.org Forums

Apr 17, 2010 | 07:53 PM

yobird

Thread Starter

Junior Member

Joined: Feb 2009

Posts: 34

Likes: 0

From: Stamford CT

ml350

Rolling down hill

OK why does my car roll back down the hill at a red light on a hill.
or is it just my car. I just missed the guy in the back of my.

Apr 17, 2010 | 07:56 PM

NYCGLK

MBWorld Fanatic!

Joined: Jan 2009

Posts: 2,780

Likes: 115

From: Northern NJ

GLK 350 / Porsche 993

why wouldn't it? It's normal if you are on the hill.

However, there is brake assist that should keep car from rolling for a couple seconds to let you push gas pedal.

Apr 17, 2010 | 08:46 PM

mr.mbenz

Super Member

Joined: May 2009

Posts: 507

Likes: 1

From: Vancouver, (BC) Best City on Planet Earth

GLK 350X :0

[QUOTE=NYCGLK;4036385]why wouldn't it? It's normal if you are on the hill.

if you are thinking that brake assist is to
not let your car roll, you're right almost...
it is not to prevent a complete roll back..

Apr 18, 2010 | 03:20 AM

Kamen

Member

Joined: Aug 2009

Posts: 220

Likes: 0

From: Richmond, BC

2010 GLK350 4MATIC, 2006 SLK350

I was downtown Seattle and had to stop on some lights on pretty steep hills and the brake assist always held the car in place for a few seconds for me to get going; never experienced the rollback myself.

Apr 18, 2010 | 07:15 AM

yobird

Thread Starter

Junior Member

Joined: Feb 2009

Posts: 34

Likes: 0

From: Stamford CT

ml350

ITs not normal. The car should NOT roll back. all the cars I had ever does not do this. I need to check the assist brake.

Apr 18, 2010 | 03:37 PM

bing1221

Junior Member

Joined: Jun 2009

Posts: 41

Likes: 4

2016 C63s

if your gear is D, and if your car had full stop by brake paddle.........your car won't roll back

Jun 9, 2010 | 04:14 AM

QSHIP

Junior Member

Joined: May 2010

Posts: 74

Likes: 0

GLK

Have your transmission check before you get an accident. This is dangerous.

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Jun 9, 2010 | 06:30 AM

GLKKa2H

Super Member

Joined: Apr 2010

Posts: 520

Likes: 5

From: Tromsø, 69° 41' N

2010 GLK 220CDI 4M BlueEFFICIENCY

Quote:

Originally Posted by QSHIP

Have your transmission check before you get an accident. This is dangerous.

Check the ML Operator's manual before advice on "transmission check". As posters already have noted, is the Brake Assist System (BAS) supporting the "Hill-start Assist System". From the chapter in the manual:

"On uphill grades, the hill-start assist system maintains the pressure in the brake system for approximately 1 second after you have released the brake pedal. Therefore, you can start off smoothly without the vehicle moving immediately after releasing the brake pedal.".

and:

"! Warning!

The hill-start assist system is not designed to function as a parking brake. It does not prevent the vehicle from moving when parked on an incline.

Always engage the parking brake in addition to shifting the automatic transmission into park position P.".

(The bold parts by me).

The OP is driving a ML, a heavy SUV, which strenghtens the physics of a car on a hill.