Z4-forum.com

Dynamic Emergency Braking
Two operating units for the brake are required by law. Besides the brake pedal, the second
operating unit in the E89 is the EMF button in the center console. Pulling the EMF
button while driving triggers dynamic emergency braking with a defined sequence via the
DSC system. This function is intended for emergencies when the driver can no longer
slow down the vehicle using the brake pedal. Other occupants can also stop the vehicle
in this way should, for example, the driver suddenly become unconscious.
During dynamic emergency braking, hydraulic braking pressure is built up at all four wheel
brakes. The DSC functions are fully active and the brake lights come on. This is an important
advantage compared to a manual parking brake.
Dynamic emergency braking takes place only for as long as the driver is pulling the EMF
button. The deceleration initiated by the DSC is increased in ramps. The EMF indicator
lamp in the instrument cluster is activated during dynamic emergency braking. In addition,
a check control message is given together with an acoustic signal in order to warn
the driver of this adverse situation.
The DSC control unit prioritizes if the driver attempts to slow down the vehicle by simultaneously
pressing the brake pedal and pulling the EMF button. The higher deceleration
request is implemented. If dynamic emergency braking is continued until the vehicle
comes to a stop, the parking brake will remain applied even after the EMF button is
released. The EMF indicator lamp in the instrument cluster remains active. The driver
can then release the parking brake (see Releasing the Parking Brake).

So, now you know, who's going to try it??????

Thanks for sharing, I was curious as to what would happen, it's like that big red button in films that says 'Don't push'!

Not sure I'll be trying it any time soon though....

Funnily enough I was wondering just this the other day! Curiosity isn't going to kill this cat now

OK, I give in. What's "EMF" and how do you "pull" its button?

Busterboo wrote: ↑Sun Aug 20, 2017 5:37 pm OK, I give in. What's "EMF" and how do you "pull" its button?

Remember the car is German

EMF - Elektromechanische Feststellbremse.

How in the world have we lasted all these years without it.

Nictrix wrote: ↑Sun Aug 20, 2017 6:21 pm

Busterboo wrote: ↑Sun Aug 20, 2017 5:37 pm OK, I give in. What's "EMF" and how do you "pull" its button?

Remember the car is German

EMF - Elektromechanische Feststellbremse.

Thank you. Now, where's its "button" (which is English), please?

Busterboo wrote: ↑Sun Aug 20, 2017 8:06 pmThank you. Now, where's its "button" (which is English), please?

I'm guessing it's the handbrake "button", switch or whatever you like to call it.

I wonder if it will need a software upgrade after that sort of use?

Looking forward to the first report from anyone brave enough to try it!

Busterboo wrote: ↑Sun Aug 20, 2017 8:06 pm

Nictrix wrote: ↑Sun Aug 20, 2017 6:21 pm

Busterboo wrote: ↑Sun Aug 20, 2017 5:37 pm OK, I give in. What's "EMF" and how do you "pull" its button?

Remember the car is German

EMF - Elektromechanische Feststellbremse.

Thank you. Now, where's its "button" (which is English), please?

It's the handbrake, dummkopf
Rob

Busterboo wrote: ↑Sun Aug 20, 2017 8:06 pm

Nictrix wrote: ↑Sun Aug 20, 2017 6:21 pm

Busterboo wrote: ↑Sun Aug 20, 2017 5:37 pm OK, I give in. What's "EMF" and how do you "pull" its button?

Remember the car is German

EMF - Elektromechanische Feststellbremse.

Thank you. Now, where's its "button" (which is English), please?

I assume that you are being deliberately stupid?
The original post anybody who owns an E89 would know it was the electric handbrake switch that was being described.
If its not a thread about runflats or 19" wheels you dont seem to know much.

I tried is about a month after getting my first E89. It's an odd sensation not touching the pedal but stops the car remarkably quickly. The hazards flash as it brakes. If you release it before you come to a stop then it just carries on again but the hazards stay flashing. If you hold it until it stops then you have to disengange it again to get going. If I remember correctly it also knocks the car into Park on the auto 'box. I would imagine it would stall the engine in a manual unless you depressed the clutch.

You've got to try these things to see how they work, don't you? I also tried the ABS and Brake assist by switching quickly fom acceleration to hard brake as if in emergency stop. If you've never tried it then I suggest you do it on a quiet road so you know how it feels before you do it for real in traffic.

Nictrix wrote: ↑Sun Aug 20, 2017 8:26 pm The original post anybody who owns an E89 would know it was the electric handbrake switch that was being described.

Wow, now it's a switch.

Smartbear wrote: ↑Sun Aug 20, 2017 8:18 pm It's the handbrake, dummkopf
Rob

Be nice to me, Rob. I saw your front tyres today.

Busterboo wrote: ↑Sun Aug 20, 2017 11:10 pm

Smartbear wrote: ↑Sun Aug 20, 2017 8:18 pm It's the handbrake, dummkopf
Rob

Be nice to me, Rob. I saw your front tyres today.

Oh no, don't start that again!
Rob

Smartbear wrote: ↑Mon Aug 21, 2017 12:19 am

Busterboo wrote: ↑Sun Aug 20, 2017 11:10 pm

Smartbear wrote: ↑Sun Aug 20, 2017 8:18 pm It's the handbrake, dummkopf
Rob

Be nice to me, Rob. I saw your front tyres today.

Oh no, don't start that again!
Rob

Exactly.