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Acceleration delay - Sprint Booster or...?

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Old Aug 18, 2010 | 03:09 PM
  #1  
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2008 CLK350
Question Acceleration delay - Sprint Booster or...?

Hi, guys.

I am not really savvy with all that car electronics so, my question may sounds stupid but I will ask it anyways I have ‘08 CLK350 (USA) and I hate this one second delay when I press accelerator, especially from a stand-still. It makes it feel like I am driving a van or what have you. I spoke to a friend of mine and he suggested Sprint Booster (from http://www.sprintboostersales.com/). Now questions:

1. Is Sprint Booster what I need and, is it compatible with my W209? I am looking at their pictures and even though it says “CLK 2000 and newer”, they show different accelerator pedal design (mine is attached to the floor).

2. If Sprint Booster is not the solution, what is?

Tbanks!
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Old Aug 18, 2010 | 03:26 PM
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I drive the racism out of BadDebt. ;)
personally spending that kind of cash for a sprint booster...i would rather add a bit more money and get a ECU flashed and dyno tuned....

350+ for a sprint booster to eliminate delay..is kinda steep... i spend some more cash and actually get some HP/TRQ and better fuel milage aswell as the delay elimination.
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Old Aug 18, 2010 | 03:50 PM
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CLK350
all i do is drop it to manual and have it rev up to 4k and when i press the peddel it shoots!
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Old Aug 18, 2010 | 05:05 PM
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Yea, $350 sounds a bit pricey for this however, I have no idea what "a ECU flashed and dyno tuned" means or "get some HP/TRQ" for that matter As I mentioned, I am not really familiar with all that. Could you guys give me some direction here, please?
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Old Aug 18, 2010 | 07:34 PM
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Originally Posted by mortum
Yea, $350 sounds a bit pricey for this however, I have no idea what "a ECU flashed and dyno tuned" means or "get some HP/TRQ" for that matter As I mentioned, I am not really familiar with all that. Could you guys give me some direction here, please?

I have both sprintbooster and ECU tune and it's MUCH more responsive than stock. You might be able to find a used SB on eBay or the classifieds. Be on the look out. Here is some more info on the ECU tune. https://mbworld.org/forums/clk-class...g-usa-ecu.html
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Old Aug 18, 2010 | 10:44 PM
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You can always power brake. Hold brakes and rev 2k rpm and launch. Or u can manually down gear right before pressing the acceleration. But anyways driving while u manually select gears gives the same response as the speed booster
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Old Aug 18, 2010 | 10:55 PM
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Originally Posted by mortum
Yea, $350 sounds a bit pricey for this however, I have no idea what "a ECU flashed and dyno tuned" means or "get some HP/TRQ" for that matter As I mentioned, I am not really familiar with all that. Could you guys give me some direction here, please?
ECU is the engine control unit (a computer regulating fuel mixtures, combustion timing, valve timing) if you tune it, you can improve your horse power and torque. There's a group buy for ECU right now. https://mbworld.org/forums/clk-class...g-usa-ecu.html

Speedbooster does not increase horsepower or torque. It basically registers the pedal as being "floored" at like 70% depression of the pedal instead of being actually floored.

Last edited by supacrazykev; Aug 18, 2010 at 10:59 PM.
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Old Aug 19, 2010 | 01:01 PM
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2008 CLK350
OK, thanks for the info, guys - it now makes much more sense... So, from what I am gathering, if I would want to do torque modification, Spedtunning USA chip (although might be more expensive) sounds like a better deal, huh?

Thanks again!
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Old Sep 26, 2010 | 01:12 AM
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03 clk500, 06 qx56
i just got the older version of the sprint booster and its freakin awesome. no more of that one second delay. its a lot funner to rip around in. the wifey loves it. now she wants the ecu reflashed. i highly recommend the sprint booster...
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Old Sep 26, 2010 | 06:07 AM
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Originally Posted by dragon_27
i just got the older version of the sprint booster and its freakin awesome. no more of that one second delay. its a lot funner to rip around in. the wifey loves it. now she wants the ecu reflashed. i highly recommend the sprint booster...

Is that your audio setup pictured in your avatar? If so, any more pics and details of the install? Thanks.
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Old Sep 26, 2010 | 02:33 PM
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2003 CLK 320
Originally Posted by dragon_27
i just got the older version of the sprint booster and its freakin awesome. no more of that one second delay. its a lot funner to rip around in. the wifey loves it. now she wants the ecu reflashed. i highly recommend the sprint booster...
looks to be a dope set up my friend!
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Old Sep 26, 2010 | 04:20 PM
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Sprint Booster substitute - why not just push your foot to the floor 10% faster, or better yet add 30% more HP/TQ to the car so that it makes the same power when the pedal is 70% pressed, and here's the good part: It makes 30% more hp/tq when the pedal is 100% depressed
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Old Sep 27, 2010 | 02:50 AM
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hey dynomite i put more stereo pics in my profile album
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Old Sep 27, 2010 | 08:34 PM
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Originally Posted by betrezra
Sprint Booster substitute - why not just push your foot to the floor 10% faster, or better yet add 30% more HP/TQ to the car so that it makes the same power when the pedal is 70% pressed, and here's the good part: It makes 30% more hp/tq when the pedal is 100% depressed

I understood what you're saying but it does not 100% gaurantee the repsonse on the 1st try. Seriously......I personally can't drive my car without the Sprint Booster. So is my friend's (AMGSC) C55 with Kleemann SC
Satges 8.
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Old Oct 1, 2010 | 01:33 AM
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I've always noticed what I would call "spin up time" in both my CLK500 and my old E320. You slam the pedal all the way to the floor, and whether it's off the line or on the highway, the engine starts to rev up making a zooming sound almost like the transmission is slipping, it takes at least 1-2 seconds for it to finally downshift and then you start going faster.

I find that I get way better speed response if I do not floor the car, but only go down like 1/3 of the way. That's the only time my car pushes me back in my seat. This makes no sense to me??

But from what the SprintBooster website says, it doesn't sound like it will help this problem at all - they say "if you routinely mash the throttle to the floor, Sprint Booster may not be for you." Anyone find this to be incorrect or share this experience with Mercedes?
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Old Oct 1, 2010 | 02:18 AM
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Originally Posted by dstorfer
I've always noticed what I would call "spin up time" in both my CLK500 and my old E320. You slam the pedal all the way to the floor, and whether it's off the line or on the highway, the engine starts to rev up making a zooming sound almost like the transmission is slipping, it takes at least 1-2 seconds for it to finally downshift and then you start going faster.

I find that I get way better speed response if I do not floor the car, but only go down like 1/3 of the way. That's the only time my car pushes me back in my seat. This makes no sense to me??

But from what the SprintBooster website says, it doesn't sound like it will help this problem at all - they say "if you routinely mash the throttle to the floor, Sprint Booster may not be for you." Anyone find this to be incorrect or share this experience with Mercedes?


I felt the exact same way on all my Mercedes with automatic tranny as you described. The Sprint booster will fix these problems.
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Old Oct 1, 2010 | 02:21 AM
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Originally Posted by mortum
Hi, guys.

1. Is Sprint Booster what I need and, is it compatible with my W209? I am looking at their pictures and even though it says “CLK 2000 and newer”, they show different accelerator pedal design (mine is attached to the floor).Tbanks!


I'm 100% it for your car. Just decide what version do you like. The non-AMG or AMG version. I know your car is not AMG and mine Clk too but I like the AMG version best after I try them all. The non-AMG version is ways to sensitive for me.
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Old Oct 1, 2010 | 07:17 AM
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non-AMG is the way to go with a small engine.
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Old Oct 1, 2010 | 07:27 AM
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Wes, did you install your SB before or after your ECU upgrade?
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Old Oct 1, 2010 | 07:30 AM
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Before, that was one of the first mods I did.
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Old Oct 1, 2010 | 07:42 AM
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Okay. I ask because most ECU flashes/tunes re-rap the throttle and provide a better response. Have you ever removed the SB to see how the flash correction is?
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Old Oct 1, 2010 | 07:44 AM
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Nope, it's a PITA to take that thing out. Correction, it's easy to take out, getting it in is the hard part.
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Old Oct 1, 2010 | 07:52 AM
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From: A Canadian in Dubai, United Arab Emirates
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Gotcha.
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Old Oct 1, 2010 | 08:20 PM
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Originally Posted by dynomite05
Nope, it's a PITA to take that thing out. Correction, it's easy to take out, getting it in is the hard part.

It a 10 mins job.
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