How to Enable Dyno Mode

Bill T · 09-09-2006

Here's how. To start, turn the ignition key to the first accessory position, making sure the dash display shows the odometer. The SRS airbag light should be on. Press the trip odometer reset button three times rapidly before it goes off. If you do this right, a screen will appear showing a voltmeter. Then press the "up" arrow on the left side of the wheel twice to take you to the "ESP dynamometer test" screen. Using the plus (+) button on the right side of the wheel, select "on." And then start the car. Warnings will appear informing you that the ESP, ABS, and BAS (brake assist) aids are now turned off and you're on your own.
If you did it right, you've put the car in a mode intended for diagnostic testing on a rolling dynamometer—all electronic supervision is unplugged. Unhindered by techno-aids, the SLK's grip on the skidpad improved by 0.03 g compared with simply hitting the ESP switch on the dash. To return all the safety technology, scroll back to the dyno test screen and select "w/t. 15 off" with the minus (-) button. Shutting off all the electronic aids isn't easy, and that should tell you something. Owners are not generally privy to the dynamometer mode; therefore, we will continue to publish test numbers attained with the dashboard ESP switch turned off. We just thought you'd want to know

Published by Car & Driver
TONY QUIROGA, PHOTOGRAPHY BY TOM DREW
November 2004

I know this information has been around for a few years, I posted this info for all of the NEW SLK Owners here

ierax · 09-10-2006

This is a classic

**F111F** · 01-24-2007

I have tried it several times and noticed that my new tires "chirp" less often, which makes me think the ESP is hitting the brakes.

I plan on turning off when I track the car in March.

bloflin · 01-26-2007

Quote:

Originally Posted by F111F

I have tried it several times and noticed that my new tires "chirp" less often, which makes me think the ESP is hitting the brakes.

I plan on turning off when I track the car in March.

Interesting... ESP of course does applies the brakes (individually to each wheel), that is it's main control variable.

However, I didn't think it would apply the brakes hard enough to lock the wheels when you are moving at speed.

**tungster** · 01-26-2007

Too bad there isn't something like that for the R170 models.....argh!!

Tslick · 01-26-2007

Interesting question tungster, on the R170, when you turn ESP off with the button, is it turned completely off. Maybe Dan can answer that question.

When you had your recent dyno, did they press the button to turn off ESP?

**tungster** · 01-27-2007

I actually got to drive the car on the dyno and YES the first thing I did was turn the "ESP" off.

**F111F** · 01-30-2007

Quote:

Originally Posted by bloflin

Interesting... ESP of course does applies the brakes (individually to each wheel), that is it's main control variable.

However, I didn't think it would apply the brakes hard enough to lock the wheels when you are moving at speed.

It is something I noticed when I got new tires. They were a bit chirpy when cornering/accelerating, which is okay, but I expected them to stick better. They are the B-Potenza Pole Position. When I turned everything off, I noticed that my tires didn't chirp.

They do stick like glue in the rain. At speed, no chirping; just cornering hard/accelerating.

*easty* · 01-31-2007

I'd advise not to use Dyno on track, I've tried it and the results are not so great. Your vastly improving the chances of flatspotting your tyres which is pretty easy with those brakes. And really it's no faster than just ESP off mode. You may also find in really slow corners using a lot of power you'll spin up on the right due to the lack of LSD.. Just IMO

**bclark** · 02-18-2007

I know there is a difference between simply turning ESP off and
deactivating as described in Car and Driver. Can anyone elaborate?
Thanks.

**DansSlk** · 02-18-2007

Shutting ESP off using the button de-activates ASR the acceleration skid part of the system thats all it will still spring into life if it detects the car starting to deviate from the desired track.

Using dyno-mode basically shuts down most of the ESP control module so all functions of ESP are no longer available thats the

acceleration skid system
over-run system (applies reducing throttle after a quick let off at speed)
brake assist
anti-lock brakes
and last the actual traction control core system

Basically the car becomes a 1980's brake system with no help given to you at all apart from the fact the brakes even without help are considerably more powerful.

N4PWJ · 02-19-2007

i would love to do this but am worried incase i can't turn it back again, or incase something goes wrong. not worth it to be honest!

**DansSlk** · 02-19-2007

Its not going to fail off mate its real easy to power it back up and its not going to cause any failures because its a proper operating mode.

Only problems are its not meant to be used on anything bar the dyno so to try it on a public road is a bad idea you never know when you will need the TC to help you out and like you say thats not worth the risk

**bclark** · 02-20-2007

Quote:

Originally Posted by DansSlk

Shutting ESP off using the button de-activates ASR the acceleration skid part of the system thats all it will still spring into life if it detects the car starting to deviate from the desired track.

Using dyno-mode basically shuts down most of the ESP control module so all functions of ESP are no longer available thats the

acceleration skid system
over-run system (applies reducing throttle after a quick let off at speed)
brake assist
anti-lock brakes
and last the actual traction control core system

Basically the car becomes a 1980's brake system with no help given to you at all apart from the fact the brakes even without help are considerably more powerful.

\

Appreciate the thorough explanation

**F111F** · 04-05-2007

[quote=DansSlk;21156]Shutting ESP off using the button de-activates ASR the acceleration skid part of the system thats all it will still spring into life if it detects the car starting to deviate from the desired track.

Using dyno-mode basically shuts down most of the ESP control module so all functions of ESP are no longer available thats the

acceleration skid system
over-run system (applies reducing throttle after a quick let off at speed)
brake assist
anti-lock brakes
and last the actual traction control core system

quote]

DansSLK - can you explain a little more about what the "over-run system" does and what is "brake assist system (BAS)"?
I understand anti-lock brakes but not sure I understand the purpose of BAS.
Also acceleration skid system?

thanks
john

**DansSlk** · 04-05-2007

Sure thing.

ASR (Acceleration Skid Regulation) - This is one of the things normally associated with traction control it reduces the throttle if it detects wheel spin during a quick take off its what you need disabled if you want to spin the wheels up during a start, it is the only part of the system disabled when you select ESP OFF.

BAS (Brake Assist System) - Watches the brake pedal for changes in position and how fast you move the pedal in/out if it detects a fast activation it takes over control of the brakes using a servo in the master cylinder to move the diaphragm to max applying the full braking pressure available regardless of the position of the pedal itself it can also instruct the ESP module to help increase the pressure even more if need be, its used for emergency stops and hands you control again only after the car has stopped or you have completly released the brake pedal if the latter the pressure is reduced slowly to help keep it smooth)

The over-run system / Engine Braking Regulation Control (MSR ) - this comes into play when you suddenly lift off of the throttle it uses the throttle valve to regulate the engine torque to prevent wheel slip so when you take your foot clean off the pedal at 150 your asking for 0% throttle (Idle power) the car is actually going to give you 90/80/70 and so on reducing throttle gradually it helps out with the lateral stability..

The MSR and BAS are silent i.e they don't inform you when they are operating you are only made aware of them if they are in an error state however you can feel them at work especially the BAS since it changes the pressure so fast it can be quite violent.

Hope this helps

N4PWJ · 04-06-2007

it does annoy me sometimes that i can't put the rear end out in the skl at times. it is good fun the odd time to just floor it away and come out sideways. even turning ESP off it still controls yur slide. Does this dyno mode enable you to have more control over a slide in the car? not that i want to do it all the time, but when im out messing about it can be good fun.

**DansSlk** · 04-06-2007

Yeah if you where to enable dyno mode then it would let you slide the car as much as you wanted

**webslinger** · 05-17-2007

Did I read somewhere that "Dyno Mode" doesn't work with the SW in the '07 / SLK55's?

**DansSlk** · 05-17-2007

Quote:

Originally Posted by webslinger

Did I read somewhere that "Dyno Mode" doesn't work with the SW in the '07 / SLK55's?

No mate.

Dyno Mode is essential for using the car on obviously the dyno but also the brake rigs, it wont be going anytime soon.

09-09-2006	#1 (permalink)
Bill T Banned For Life.... Join Date: Jun 2006 Location: South Florida, USA Vehicle: Porsche Turbo Posts: 1,169 Country: Thanks: 18 Thanked 153 Times in 46 Posts	How to Enable Dyno Mode Here's how. To start, turn the ignition key to the first accessory position, making sure the dash display shows the odometer. The SRS airbag light should be on. Press the trip odometer reset button three times rapidly before it goes off. If you do this right, a screen will appear showing a voltmeter. Then press the "up" arrow on the left side of the wheel twice to take you to the "ESP dynamometer test" screen. Using the plus (+) button on the right side of the wheel, select "on." And then start the car. Warnings will appear informing you that the ESP, ABS, and BAS (brake assist) aids are now turned off and you're on your own. If you did it right, you've put the car in a mode intended for diagnostic testing on a rolling dynamometer—all electronic supervision is unplugged. Unhindered by techno-aids, the SLK's grip on the skidpad improved by 0.03 g compared with simply hitting the ESP switch on the dash. To return all the safety technology, scroll back to the dyno test screen and select "w/t. 15 off" with the minus (-) button. Shutting off all the electronic aids isn't easy, and that should tell you something. Owners are not generally privy to the dynamometer mode; therefore, we will continue to publish test numbers attained with the dashboard ESP switch turned off. We just thought you'd want to know Published by Car & Driver TONY QUIROGA, PHOTOGRAPHY BY TOM DREW November 2004 I know this information has been around for a few years, I posted this info for all of the NEW SLK Owners here Last edited by Bill T; 01-21-2007 at 11:10 AM.
	http://www.slkworld.com/

01-26-2007	#5 (permalink)
tungster Founding Member / Moderator Join Date: Jun 2006 Location: Rowlett, TX Vehicle: 2002 C2DSLK32K Posts: 225 Country: Thanks: 0 Thanked 1 Time in 1 Post	Too bad there isn't something like that for the R170 models.....argh!! __________________ C2D 2002 SLK32K C2Design and Kleemann Modified 360.0 rwhp 349.8 rwtq Check My vBGarage for all Modifications

01-27-2007	#7 (permalink)
tungster Founding Member / Moderator Join Date: Jun 2006 Location: Rowlett, TX Vehicle: 2002 C2DSLK32K Posts: 225 Country: Thanks: 0 Thanked 1 Time in 1 Post	I actually got to drive the car on the dyno and YES the first thing I did was turn the "ESP" off. __________________ C2D 2002 SLK32K C2Design and Kleemann Modified 360.0 rwhp 349.8 rwtq Check My vBGarage for all Modifications

01-31-2007	#9 (permalink)
easty Moderator Join Date: Jun 2006 Location: Montreal Vehicle: ///AMG Posts: 2,069 Country: Thanks: 16 Thanked 18 Times in 8 Posts	I'd advise not to use Dyno on track, I've tried it and the results are not so great. Your vastly improving the chances of flatspotting your tyres which is pretty easy with those brakes. And really it's no faster than just ESP off mode. You may also find in really slow corners using a lot of power you'll spin up on the right due to the lack of LSD.. Just IMO __________________ "I'm not a roman mum, I'm a kike, a yid, a heebie, a hook-nose, I'm kosher mum, I'm a Red Sea pedestrian, and proud of it!" Life of Brian To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.

02-18-2007	#11 (permalink)
DansSlk Super Moderator Join Date: Jun 2006 Location: Wales Vehicle: 05 B55S (Brabus 6.1 S) Posts: 6,456 Country: Thanks: 85 Thanked 144 Times in 115 Posts	Shutting ESP off using the button de-activates ASR the acceleration skid part of the system thats all it will still spring into life if it detects the car starting to deviate from the desired track. Using dyno-mode basically shuts down most of the ESP control module so all functions of ESP are no longer available thats the acceleration skid system over-run system (applies reducing throttle after a quick let off at speed) brake assist anti-lock brakes and last the actual traction control core system Basically the car becomes a 1980's brake system with no help given to you at all apart from the fact the brakes even without help are considerably more powerful. __________________ One thing you will learn with German cars - If it's simple it ain't happening.

09-10-2006	#2 (permalink)
ierax Elite SLK World Member Join Date: Jun 2006 Vehicle: Obsidian black SLK Posts: 292 Country: Thanks: 0 Thanked 0 Times in 0 Posts	This is a classic

01-24-2007	#3 (permalink)
F111F Elite SLK World Member Join Date: Oct 2006 Location: Plano, TX Vehicle: SLK55 Black Mocha Designo Posts: 277 Country: Thanks: 27 Thanked 10 Times in 5 Posts	I have tried it several times and noticed that my new tires "chirp" less often, which makes me think the ESP is hitting the brakes. I plan on turning off when I track the car in March.

01-26-2007	#6 (permalink)
Tslick Elite SLK World Member Join Date: Aug 2006 Location: Long Beach, Ca Vehicle: SLK32 AMG Posts: 1,289 Country: Thanks: 55 Thanked 43 Times in 19 Posts	Interesting question tungster, on the R170, when you turn ESP off with the button, is it turned completely off. Maybe Dan can answer that question. When you had your recent dyno, did they press the button to turn off ESP?

02-18-2007	#10 (permalink)
bclark Elite SLK World Member Join Date: Jun 2006 Location: Oak Park, Illinois, USA Vehicle: 2005 Black SLK Posts: 249 Country: Thanks: 0 Thanked 5 Times in 1 Post	I know there is a difference between simply turning ESP off and deactivating as described in Car and Driver. Can anyone elaborate? Thanks.

02-19-2007	#12 (permalink)
N4PWJ Elite SLK World Member Join Date: Aug 2006 Location: Belfast,N.Ireland Vehicle: 2006,slk280,carlsson Other Toys: Caterham Posts: 1,414 Country: Thanks: 1 Thanked 3 Times in 3 Posts	i would love to do this but am worried incase i can't turn it back again, or incase something goes wrong. not worth it to be honest!

02-19-2007	#13 (permalink)
DansSlk Super Moderator Join Date: Jun 2006 Location: Wales Vehicle: 05 B55S (Brabus 6.1 S) Posts: 6,456 Country: Thanks: 85 Thanked 144 Times in 115 Posts	Its not going to fail off mate its real easy to power it back up and its not going to cause any failures because its a proper operating mode. Only problems are its not meant to be used on anything bar the dyno so to try it on a public road is a bad idea you never know when you will need the TC to help you out and like you say thats not worth the risk __________________ One thing you will learn with German cars - If it's simple it ain't happening.

04-05-2007	#15 (permalink)
F111F Elite SLK World Member Join Date: Oct 2006 Location: Plano, TX Vehicle: SLK55 Black Mocha Designo Posts: 277 Country: Thanks: 27 Thanked 10 Times in 5 Posts	[quote=DansSlk;21156]Shutting ESP off using the button de-activates ASR the acceleration skid part of the system thats all it will still spring into life if it detects the car starting to deviate from the desired track. Using dyno-mode basically shuts down most of the ESP control module so all functions of ESP are no longer available thats the acceleration skid system over-run system (applies reducing throttle after a quick let off at speed) brake assist anti-lock brakes and last the actual traction control core system quote] DansSLK - can you explain a little more about what the "over-run system" does and what is "brake assist system (BAS)"? I understand anti-lock brakes but not sure I understand the purpose of BAS. Also acceleration skid system? thanks john

04-05-2007	#16 (permalink)
DansSlk Super Moderator Join Date: Jun 2006 Location: Wales Vehicle: 05 B55S (Brabus 6.1 S) Posts: 6,456 Country: Thanks: 85 Thanked 144 Times in 115 Posts	Sure thing. ASR (Acceleration Skid Regulation) - This is one of the things normally associated with traction control it reduces the throttle if it detects wheel spin during a quick take off its what you need disabled if you want to spin the wheels up during a start, it is the only part of the system disabled when you select ESP OFF. BAS (Brake Assist System) - Watches the brake pedal for changes in position and how fast you move the pedal in/out if it detects a fast activation it takes over control of the brakes using a servo in the master cylinder to move the diaphragm to max applying the full braking pressure available regardless of the position of the pedal itself it can also instruct the ESP module to help increase the pressure even more if need be, its used for emergency stops and hands you control again only after the car has stopped or you have completly released the brake pedal if the latter the pressure is reduced slowly to help keep it smooth) The over-run system / Engine Braking Regulation Control (MSR ) - this comes into play when you suddenly lift off of the throttle it uses the throttle valve to regulate the engine torque to prevent wheel slip so when you take your foot clean off the pedal at 150 your asking for 0% throttle (Idle power) the car is actually going to give you 90/80/70 and so on reducing throttle gradually it helps out with the lateral stability.. The MSR and BAS are silent i.e they don't inform you when they are operating you are only made aware of them if they are in an error state however you can feel them at work especially the BAS since it changes the pressure so fast it can be quite violent. Hope this helps __________________ One thing you will learn with German cars - If it's simple it ain't happening.

04-06-2007	#17 (permalink)
N4PWJ Elite SLK World Member Join Date: Aug 2006 Location: Belfast,N.Ireland Vehicle: 2006,slk280,carlsson Other Toys: Caterham Posts: 1,414 Country: Thanks: 1 Thanked 3 Times in 3 Posts	it does annoy me sometimes that i can't put the rear end out in the skl at times. it is good fun the odd time to just floor it away and come out sideways. even turning ESP off it still controls yur slide. Does this dyno mode enable you to have more control over a slide in the car? not that i want to do it all the time, but when im out messing about it can be good fun.

04-06-2007	#18 (permalink)
DansSlk Super Moderator Join Date: Jun 2006 Location: Wales Vehicle: 05 B55S (Brabus 6.1 S) Posts: 6,456 Country: Thanks: 85 Thanked 144 Times in 115 Posts	Yeah if you where to enable dyno mode then it would let you slide the car as much as you wanted __________________ One thing you will learn with German cars - If it's simple it ain't happening.

05-17-2007	#19 (permalink)
webslinger Elite SLK World Member Join Date: Apr 2007 Location: Bay Area, CA Vehicle: '07 SLK55 AMG Other Toys: Honda motorcycle Posts: 519 Country: Thanks: 19 Thanked 20 Times in 12 Posts	Did I read somewhere that "Dyno Mode" doesn't work with the SW in the '07 / SLK55's?