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I have recently sold our SLK350 which we bought new in 2005 after 14 years of very reliable and thoroughly enjoyable service from it. So much so that I have now bought an ex demonstrator SLC 300 from our local MB dealership. I like everything about the car except for the uninspiring exhaust droning noise especially at low revs. To overcome this dilemma I keep the car in Sport mode but even in this mode the exhaust noise takes away some of the enjoyment of driving the car. The SLK350 had a wonderful tuneful V6 exhaust note which was a pleasure to listen to but so different on the SLC. I accept that a 4 cylinder turbocharged engine will produce a different exhaust note, just like on the current Porsche Boxster, and I was aware of the problem when agreeing to buy the car but is there anything which can be done to lessen the droning effect? I know that on some other Mercedes and Porsche cars with sport exhausts they have a switch which can turn off the racket if need be. Or is there any software adjustment which can overcome the problem? Various motoring journalists have also commented on this problem. I would appreciate any advice.
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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Super Moderator CA 2012 SLK55 AMG w/P30
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13,157 Posts
Welcome from Canada :smile:
 

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Premium Member 2012 SLK350
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904 Posts
Wish I could help you with the drone, but hey...welcome from St Augustine FL
Enjoy the ride

Sent from my SM-T550 using Tapatalk
 

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Super Moderator UK SLK 55 AMG 2007
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27,228 Posts
Welcome from Wirral, England.

Some guides on how to use forum features https://www.slkworld.com/forum-operations-help-center/536527-links-how-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.
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Really useful links (thanks to ixions cataloguing)
https://www.slkworld.com/general-discussion/354330-links-toparts-assemblies-technical-data-locations-parts-slks.html
https://slk-links.neocities.org/ Includes diy videos.
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A brief guide to the forum and how to get the best from it:
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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.
https://www.slkworld.com/general-discussion/
https://slk-links.neocities.org/BUYING.html

You can find your region by scrolling down the page on this link
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@Col played with his exhaust, but not sure it would have the outcome you desire.
He'll drop by at some point.
 

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Premium Member 2012 SLK55 AMG
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2,496 Posts
Welcome to the forum. I’ve not heard an SLC300 in person but I’ve heard negative comments from members who have before.

There are lots of mods you can try but it will by trial and error unless you can find someone else who’s modified their exhaust with good results.

If the car is under warranty messing with the exhaust will invalidate it!

You should be able to make improvements but you’ll never get it as good as your old 350 I fear.

Good luck in your pursuits!
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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96,360 Posts
Remember what Mr Wizard always told Tooter Turtle:

Always always I tell you Tooter, be just what you is, not what you is not. Folks what do this is the happiest lot

 

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Super Moderator 2006 SLK 280
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Welcome to SLKWorld.com from Northern
California

:burnout::Beer:

List of Useful SLK Links >https://slk-links.neocities.org/Links.html

PARTS Information on Mercedes SLK R170 R171 R172 >https://slk-links.neocities.org/

http://www.slkworld.com/vehicle-data-card/67706-free-how-get-free-datacard.html
<---------------------


We have a free to enter monthly competition.
Entry is 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 favorite.
Here's the main thread:
<---------------------

ROTM Submissions & Voting - Mercedes
Benz SLK Forum
 

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Super Moderator 2010 SLK300 2LOOK
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Hi and welcome from Lakeland Florida USA!
 

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Premium Member 2009 SLK55 AMG
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11,785 Posts
Welcome from the Sacramento Valley SLK Enthusiasts!
 

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Premium Member 2018 SLC43
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2,600 Posts
Welcome from South Buck's :tu:

Coming from the facelift R171/350 with it's X-pipe exhaust, I agree it had a good balance of refinement when just cruising and noise when You pushed on... R)

You could try and find a good exhaust garage that can get the right balance, but as already said would be a case of trial and error...
 
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