Must have modification for SLK55 AMG - Mercedes Benz SLK Forum

Performance MODS for the R171 Tuning and Performance modifications for your SLK

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#1 Old 03-29-2015
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Must have modification for SLK55 AMG

I haven't owned my SLK55 for too long but was instantly impressed with it's power and noise but frustrated by its laggy gear shift when using the manual selection.


I took it to my local Mercedes performance specialist in the UK and they fitted a system called Sprint Booster that electronically removes the lag in gear change and throttle response. It has gives the driver the ability t switch it off, have it at a semi-aggressive setting (Green setting) or full aggression (Red setting).


It cost Ł200 fitted and the difference is impressive. Even in Green mode the gear changes are very quick but put it in red mode and they are near enough instant and if you leave the car in auto gear change and plant your foot down the gear changes are as quick as an F458 (which I've been lucky enough to drive) and it accelerates quicker than standard.


In my opinion it's a must have performance mod for not much money.
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#2 Old 03-29-2015
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Yes we have many threads on that mod (Sprint Booster). Thanks for posting

https://www.slkworld.com/amgs/123474-...lk-55-amg.html

https://www.slkworld.com/general-modi...ice-guide.html


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Last edited by jbanks15; 04-06-2015 at 06:20 PM.
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#3 Old 03-29-2015
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That's an insanely affordable mod, and sounds great.
Thanks for the thread OP!

Is it hard on the car at all to have this mod?
I read the accompanying thread, sounds like there may be some issues with it.

Last thing I wanna do is a mod that is hard on the car.

Thoughts?
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#4 Old 03-29-2015
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you haven't even had your current mod a week yet!!!!!!

of course some members have it and like it and some don't think it is necessary

do this. it is free:

https://www.slkworld.com/general-disc...-learning.html


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#5 Old 03-29-2015
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That's insane.
Too easy.

Is there a way to set it back to original?

I see where you say you reset yours every 6 months... so is that about the duration the setting holds?

Thanks, banks.
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no, i just don't do it as often because i am the only one that uses my car and i always have jack rabbit starts

haven't done it though since before my ecu kleemann tune.

there is no back to original. who is to say what original is? you mean factory....who knows granny!


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#7 Old 03-29-2015
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Where did you have that fitted picard?
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#8 Old 03-30-2015
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Hi. I got this fitted at CKS Performance who are near Watford. They specialise in Mercedes performance mods. I had one fitted to my previous SLK320 (R170) and used it in Red mode for nearly two years without any issues at all. They have a pretty good website where you can loo up details on the Sprint Boost and other mods they can do (they focus mostly on ECU and exhaust upgrades).
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#9 Old 04-04-2015
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I've seen that CKS performance advertising on eBay, yes definitely do a lot of things for the Merc's.

I got one off ebay Germany and fitted it today, you don't need to stomp the throttle in red mode that's for sure.
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#10 Old 04-06-2015
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Originally Posted by v8mark View Post
I've seen that CKS performance advertising on eBay, yes definitely do a lot of things for the Merc's.

I got one off ebay Germany and fitted it today, you don't need to stomp the throttle in red mode that's for sure.

What do you think? Noticeably better throttle response and gear change for not much money really?
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#11 Old 04-08-2015
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I've been leaving mine in the green setting and find that setting suits me most. I notice the gear changes seem to be quicker in the red setting for sure, especially the down shifts.
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#12 Old 04-08-2015
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Quote:
Originally Posted by v8mark View Post
I've been leaving mine in the green setting and find that setting suits me most. I notice the gear changes seem to be quicker in the red setting for sure, especially the down shifts.

I believe this is similar to the dte pedalbox system?
ive been thinking about installing one but not so sure after reading various forums about it mainly bmw forums regarding the pedalbox
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