New to the forum and SLK 350 - Mercedes Benz SLK Forum

New Members Introduce Yourself Here New members come here first!. Update your profile: model, year and location. Post any issues in the relevant section. The team may then post a link to your issue thread in your introduction.

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  • 9 Post By Julien Fasoranti
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#1 Old 07-18-2019
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(Thread Starter)
New to the forum and SLK 350

Hi there,

I’ve been a long time lurker on the forum and now a thrilled owner of a 2015 350 AMG sport. A great car for sure, much faster than my previous 2000 Honda S2000. I love it.

That said, buying second hand cars is never as straightforward as one would hope, so I’m hoping for some guidance particularly around the manual mode on the gear box.

The car shares family duties with a 2018 VW Tiguan With a DSG box. This box in manual mode does everything it is told - upshifts, downshifts, whatever it is asked of it. The SLK on the other hand is less inclined to upshift beyond M3 unless the car is going at a fair lick - M6/M7 seem out of reach on public roads as the corresponding speed would be way too antisocial.

The car also seems too eager when downshifting, doing so more in line with engine speed than operator input.

Normal drive (E mode) is fine as is S mode. I’ve also tried resetting the box, all to no avail.

Is this normal for a 4 year old car with 20k miles, or should I be looking at some sort of service/repair?

Thanks for reading
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#2 Old 07-18-2019
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Welcome from Gloucester uk
What you describe is quite normal. The gearbox in the SLK is an auto box through a torque converter where as the DSG is a double clutch manual box. The gearbox ECU will not let you change up a gear unless the speed is correct and will automatically downshift to keep you in the correct gear for the speed you are doing.
In my 55 I use the rule: gear number (as mph) - 10 is when I can change up a gear. Eg I can change to 2nd gear @ 10mph (20 - 10 = 10), 3rd @ 20mph (30 - 10 = 20)etc so to get to 7th I need to be at 60mph (70 - 10 = 60)
It takes a little getting used to but when you’ve mastered it then you will really enjoy using the manual mode.
I hope this helps?


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#3 Old 07-18-2019
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Welcome to SLKWorld.com: The #1 Mercedes-Benz SLK Forum from Florida!



https://www.mbusa.com/mercedes/servi...owners_manuals

https://www.mbusa.com/mercedes/servi...enance_manuals

mods you should do:
smarttop

https://www.slkworld.com/general-dis...ing-about.html

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Your brochure:
https://www.slkworld.com/general-dis...ml#post1511249


Free Gift!: Post your vin in the Vehicle Datacard Request section to get a free datacard (options on your car).

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#4 Old 07-18-2019
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Welcome to the forum
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#5 Old 07-18-2019
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Hi from London too,

Welcome aboard!
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#6 Old 07-18-2019
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Welcome from the Sacramento Valley SLK Enthusiasts!

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Sacramento Valley SLK Enthusiasts!

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If you live in Northern California you can join us for a drive. We meet monthly for drives, road trips lunches. Feel free to call me or email me and I can add you to our email list. I always post events under California here on SLKWORLD.
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#7 Old 07-18-2019
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Welcome from North Jersey
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#8 Old 4 Weeks Ago
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Hi Julien, welcome from Barrhead, Scotland.


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#9 Old 4 Weeks Ago
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Welcome from Wirral, England.

Some guides on how to use forum features https://www.slkworld.com/forum-opera...w-threads.html



We have a free to enter monthly competition.
Entry is normally open from the 1st to the 15th of every month. You simply post a reply with 3 photos.
After the 15th we usually open a poll for members to vote on their favourite.
Here's the main thread:
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New members are welcome to enter (and they win too!).


This could be you in 12 months: https://www.slkworld.com/rotm-winner...simplyslk.html

Really useful links (thanks to ixions cataloguing)
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https://slk-links.neocities.org/ Includes diy videos.
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There's a link to R170/171/172's do it yourself threads under the pic below.

Some useful tips in this section for new and prospective owners.
Worth knowing are reset adaptive learning, check list, Spring is here and what is the SmartTop.
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https://slk-links.neocities.org/BUYING.html

You can find your region by scrolling down the page on this link
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Try driving in manual mode for a trip or two and see what it's like after that.

Doubt there's any transmission/gearbox issue on a 2015.

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Thanks go to those that post problems, solutions & feedback. It all helps.


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Smartop : Cubby Holder : Cree fronts : Both rear fogs : Clock Insert : Quicksilver exhaust



Useful R170 diy:

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#10 Old 4 Weeks Ago
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Hi and welcome from Lakeland, Florida USA!


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#11 Old 4 Weeks Ago
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#12 Old 4 Weeks Ago
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Welcome from Mersea Island, Essex, UK.


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#13 Old 4 Weeks Ago
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Welcome from just West of London - The R172/350 is a good choice and lucky to find a 2015 model

When driving My old R171/350, I found that under hard acceleration just lifting off the gas peddle a tad after selecting a higher gear on the flappy pedals helped for a quicker more predictable change.

On the facelift R172 with the 9G box, the gear change is more instant, but no V6 or V8 normally aspirated engines...
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#14 Old 4 Weeks Ago
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Welcome from Portland, Oregon. Enjoy the forum and the top down driving.


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