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  #1  
Old 10-24-2019, 07:08 PM
isstatu1 isstatu1 is offline
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Ebrake

Which brakes does the ebrake engage? Just the rears or also the fronts?
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  #2  
Old 10-24-2019, 09:55 PM
Robin750 Robin750 is offline
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Quote:
Originally Posted by isstatu1 View Post
Which brakes does the ebrake engage? Just the rears or also the fronts?
Just the rears.
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  #3  
Old 10-25-2019, 03:40 PM
Bolosman Bolosman is offline
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Out of curiosity, the auto hold function, which end does that engage?
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  #4  
Old 10-25-2019, 04:31 PM
Markst Markst is offline
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It should engage all four brakes, since it uses the DSC module and not the parking brake one.

Last edited by Markst; 10-25-2019 at 04:32 PM.
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Old 11-08-2019, 01:48 PM
Bolosman Bolosman is offline
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Thanks
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Old 11-10-2019, 09:31 PM
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QSilver7 QSilver7 is offline
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Quote:
Originally Posted by Bolosman View Post
Out of curiosity, the auto hold function, which end does that engage?
It uses all 4 brakes while moving...but when the car comes to a standstill...the par(k)ing {edited to fix misspelling} brake is applied. See info below from the TIS website.

If you want more info about the parking brake and auto-hold...just go to the www.newtis.info website, enter the last 7 digits of your VIN...then type "parking brake button" into the search box...and you'll get results that you can click on to learn more about these features and how they operate.


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Old 11-10-2019, 09:36 PM
Markst Markst is offline
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Quote:
At engine standstill, the parking brake assumes the holding function
To me that means that the car switches to the parking brake when the engine is off (standstill). It does not imply that the parking brake is used when the car is standstill but the engine is running.
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Old 11-10-2019, 09:57 PM
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Old 11-10-2019, 10:15 PM
Markst Markst is offline
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The bit you added just explains that if you pull the parking brake while the engine is running, all four brakes are hydraulically applied.
I think you are agreeing with me? Auto-Hold uses all 4 brakes.
In your first post it looked like you were saying auto-hold is braking only the rear (with the parking brake).
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Old 11-11-2019, 12:03 AM
Robin750 Robin750 is offline
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I think the confusion is probably due to translation since these documents were probably originally in German. "Engine standstill" refers to engine off, not when the car is at a standstill.

The "parking brake" system can activate either the service brakes through DSC or the drum brakes through the electromechanical parking brake (EMF module, that system was replaced with a combined caliper on the G12 and newer models). For example, when you come to a stop and activate the parking brake, the system initially applies the service brakes. Only after you turn off the engine does it engage the drum brakes and release the service brakes. Similarly, when you start the car, the service brakes are applied and drum brakes are released when the driver's seat belt is fastened. This is why you can automatically "disengage" the parking brake by stepping on the accelerator without having to wait for the EMF to operate the cables.

Auto hold normally applies the service brakes, but like the parking brake, the drum brakes are engaged if you turn the engine off, thus automatically setting the parking brake.
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Old 11-11-2019, 08:38 AM
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Quote:
Originally Posted by Markst View Post
The bit you added just explains that if you pull the parking brake while the engine is running, all four brakes are hydraulically applied.
I think you are agreeing with me? Auto-Hold uses all 4 brakes.
In your first post it looked like you were saying auto-hold is braking only the rear (with the parking brake).
Yes...I'm agreeing with you. The additional info in the 2nd post was done because I couldn't originally find it...and the info in the 1st post only referred to the Auto-Hold feature.

The info in the first post is the same info at the bottom of the info in the second post...so no, I was not saying that auto-hold is braking only the rear. We are on the same page.
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Old 11-11-2019, 10:00 AM
isstatu1 isstatu1 is offline
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Thanks for the input guys. Was just looking for info for a brake pad and rotor change to see what will I encounter. If the rear of the car is on a floor jack, what keeps it from rolling forward? Is the transmission locked while the engine is off?

Last edited by isstatu1; 11-11-2019 at 10:01 AM.
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  #13  
Old 11-11-2019, 10:07 AM
Robin750 Robin750 is offline
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Quote:
Originally Posted by isstatu1 View Post
Thanks for the input guys. Was just looking for info for a brake pad and rotor change to see what will I encounter. If the rear of the car is on a floor jack, what keeps it from rolling forward? Is the transmission locked while the engine is off?
If you're going to have both rear wheels off the ground, then you'll want to place chocks on the front wheels.
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Old 11-13-2019, 11:03 AM
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QSilver7 QSilver7 is offline
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Quote:
Originally Posted by isstatu1 View Post
...If the rear of the car is on a floor jack, what keeps it from rolling forward? Is the transmission locked while the engine is off?
Quote:
Originally Posted by Robin750 View Post
If you're going to have both rear wheels off the ground, then you'll want to place chocks on the front wheels.
Ditto Robin...WHEEL CHOCKS wedging the front tires!!!!

BTW, yes, the transmission will be locked...but with the rear tires lifted off the ground...you have turned the car into a wheel-barrow...so even though the transmission is in park and the emergency brake/parking brake is actuated...none of those things will stop the car from rolling forward when the rear end is lifted of the ground. Thus the wheel chocks are needed to wedge the front tires!
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2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 2013 F06 650ix Gran Coupe` (Black Sapphire) 1/13 mfg date
(SOLD)
97 740iL (Arctic Silver) <<~>> 99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

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