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A button under the gas pedal....wut is it for?

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Old Feb 23, 2005 | 01:31 AM
  #1  
PsssTkiD's Avatar
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'02 c230k coupe
A button under the gas pedal....wut is it for?

i was waiting in the car....and the car engine was off....i was playing with the gas and pressing it all the way, then theres a button!.. wut is that for?
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Old Feb 23, 2005 | 01:36 AM
  #2  
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From: West Covina, CA
2004 C230k (SOLD), 2005 C230k (Lease ended), 2004 Carrera 4 Cab, 2007 530i
thats a kill switch to prevent you from flooring your car.
or this that your NOS button? :p

hahah j/k....I've never noticed there was this thing.
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Old Feb 23, 2005 | 01:38 AM
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ill see wut happens....

i should drive around ...then reach that button with my left foot and see wut will happen.... lol
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Old Feb 23, 2005 | 01:39 AM
  #4  
I KOMPRZ's Avatar
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From: West Covina, CA
2004 C230k (SOLD), 2005 C230k (Lease ended), 2004 Carrera 4 Cab, 2007 530i
maybe you will get extra boost ....lolz
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Old Feb 23, 2005 | 01:41 AM
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makes your daughter horny
Originally Posted by PsssTkiD
i was waiting in the car....and the car engine was off....i was playing with the gas and pressing it all the way, then theres a button!.. wut is that for?
You've never felt the button before while driving? Man i must floor my car at least 10x per day. Anyways, thats the kick down switch, when u floor it and hit that button it will kick down the transmission into the lowest gear possible. I'm not sure the advantage of this setup.. it seems like a poor design to me, if I have the gas pedal pressed down that far, I expect the transmission to be in the appropriate gear already, I wouldn't think there would be a need for a switch.

BTW, there is logic built into the system - if the pedal is not pressed down all the way tapping the kick down switch does nothing.
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Old Feb 23, 2005 | 01:46 AM
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From: Bay.Area
'02 c230k coupe
Originally Posted by W Cole
You've never felt the button before while driving? Man i must floor my car at least 10x per day. Anyways, thats the kick down switch, when u floor it and hit that button it will kick down the transmission into the lowest gear possible. I'm not sure the advantage of this setup.. it seems like a poor design to me, if I have the gas pedal pressed down that far, I expect the transmission to be in the appropriate gear already, I wouldn't think there would be a need for a switch.

BTW, there is logic built into the system - if the pedal is not pressed down all the way tapping the kick down switch does nothing.
why would it be a kick down switch though?.....i mean..if u floor the car and reach that button...then the RPM should be in the more than 4/5000 already...if the gear goes down..then...the engine will blow up!.. lol..
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Old Feb 23, 2005 | 01:54 AM
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2005 Obsidian Black C230 Komp Sports Sedan, 2006 Iridium Silver ML350 SUV
its a kickdown switch correct. i think when its pressed. it held up the RPM to the maxiam range before shift... 6200rpm
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Old Feb 23, 2005 | 02:53 AM
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That button also override speed limiter.
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Old Feb 23, 2005 | 03:29 AM
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Originally Posted by W0n6_3d4n
That button also override speed limiter.
Uh, no it doesn't. I've had my pedal to the floor and still been shut down at 135.
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Old Feb 23, 2005 | 03:49 AM
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Debadged 6-Speed '05 C320 Sports Coupe
The WOT, wide open throttle, switch. When actuated, the engine ECU uses a different map, with greater emissions, to motivate at a greater rate.
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Old Feb 23, 2005 | 06:12 AM
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Not the governed speed limiter, but the user set up speed limiter. You may not have it over there but it's a standard feature down under.
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Old Feb 23, 2005 | 06:50 AM
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I had a 98' automatic CLK200K and it had the switch and it was great

One question, I have my coupe, a diesel one, with 6 manual gears and it have the switch too!!!
Does it do anything, I didn't noticed yet???
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Old Feb 23, 2005 | 08:04 AM
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Originally Posted by W0n6_3d4n
Not the governed speed limiter, but the user set up speed limiter. You may not have it over there but it's a standard feature down under.
Hey Rez, do you actually use it?!! I've probably used it once...its annoying because you can only set it in 10km/hr increments.
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Old Feb 23, 2005 | 08:23 AM
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Yeah i used it when i went to get my licence , to make sure i wouldn't overspeed.
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Old Feb 23, 2005 | 08:39 AM
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It is to tell the ECU that the Drive By Wire Throttle is at Wide Open Throttle on all models. Also is the kickdown for the auto tranny. The tranny by design will only drop one gear lower unless you hit that switch. So if you are going 40 MPH in 5th and floor it but do not engage the kickdown switch you will only drop to 4th gear. The switch tells the tranny controller to drop to the absolute lowest gear that can be used so at 40 it would drop to at least 3rd. I even have this on my 190E, it uses a standard bowden cable for downshifting but at say 25 I am in 4th if just cruising, so it will only drop to 3rd. Well I want 2nd so I push hard enough to engage the switch and then my transmission drops to 2nd for me. Also in that car it forces a 1st gear start as opposed to 2nd gear which is normal. Its main purpose though is WOT!
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Old Feb 23, 2005 | 10:20 AM
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thank you people for filling me in.

i thot it's a self-destruct button...LOL....i was scared to use it
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Old Feb 23, 2005 | 10:45 AM
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Originally Posted by gaiex
I had a 98' automatic CLK200K and it had the switch and it was great

One question, I have my coupe, a diesel one, with 6 manual gears and it have the switch too!!!
Does it do anything, I didn't noticed yet???
Yeah, same as the auto's in that it will cancel the speed limiter (UK model), but I think that's all. Haven't noticed any difference in acceleration in my 6-speed when flooring it though, so I think the ECU remap thing only applies to auto's.
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Old Feb 23, 2005 | 12:00 PM
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that button get's pressed like 35 times a day in my coupe

Does anyone else notice that it tries poping back out after 1~2 gears? Example: from still stand, floor pedal activating button & hold, stiffen your neck as you take off and watch the ESP triangle flash at you, after 1st gear with auto it feels like the button is trying to puch back out. Now I can push a little harder to keep it in, but if I don't pay attention, it'll pop out.

Anyone else have this?
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Old Feb 23, 2005 | 12:20 PM
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its also a magic fairy carwash button. if you hold it down long enough, tinkerbell comes out and washes your car...inside and out!
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Old Feb 23, 2005 | 12:33 PM
  #20  
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Originally Posted by Deutscher_Wagen
that button get's pressed like 35 times a day in my coupe

Does anyone else notice that it tries poping back out after 1~2 gears? Example: from still stand, floor pedal activating button & hold, stiffen your neck as you take off and watch the ESP triangle flash at you, after 1st gear with auto it feels like the button is trying to puch back out. Now I can push a little harder to keep it in, but if I don't pay attention, it'll pop out.

Anyone else have this?
Yeah it is due to the shift of weight during the 1st to 2nd shift. My 190E even does that due to the little thrust due to the gear change. I have to actually think to keep it held down. My body just must move enough to lift my foot a hair of the throttle!
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Old Feb 23, 2005 | 03:57 PM
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You guys are all crazy It sends out a signal to the police that you are speeding like the Road Runner (beep beep!) and identifys your car
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Old Feb 23, 2005 | 09:28 PM
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I thought the button taught you how to spell "what"(not "wut"), "thought"(not "thot") and proper punctuation.
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Old Feb 23, 2005 | 11:05 PM
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Originally Posted by Rick
I thought the button taught you how to spell "what"(not "wut"), "thought"(not "thot") and proper punctuation.
so, wuts with the hate?
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Old Feb 23, 2005 | 11:32 PM
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Yea, we thot you wasn't like dat.
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Old Feb 23, 2005 | 11:54 PM
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its the turbo boost button. now if we can only find the red light on the Hood like KITT had!
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