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Administrator Founding Member since 2006
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Wait...:D you want me to go from my Super Charged 55 to a 43?
Just messing with ya! Good luck!

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Discussion Starter · #3 ·
Wait...:D you want me to go from my Super Charged 55 to a 43?
Just messing with ya! Good luck!

View attachment 599367
Wow a Kleeman upgrade to boot. My only gripe with the 55 is I want a damn shifter something I cant have in a 43 either. That 43 is fast but probably on par with what u have already!!! I think its a 0-60 in 4.5 or so. Needing a manual stick shift sets me back to 0-60 in 5 on the slk 350 so I can live with that. damn mustangs are faster and that kinda cheeses me off so someday I'll supercharge it.
 

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Administrator Founding Member since 2006
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106,173 Posts
Wow a Kleeman upgrade to boot. My only gripe with the 55 is I want a damn shifter something I cant have in a 43 either. That 43 is fast but probably on par with what u have already!!! I think its a 0-60 in 4.5 or so.
55 has paddle shifters :D
 

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Administrator (Canada)
2012 SLK55 AMG w/P30 "Schwarzie"
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18,679 Posts
Well, "others" (same family relationship to "well, they said...." 😉 ) that turbos are more likely to be subject to extensive repairs than a NA (normally aspirated) engine would be.

FWIW.
 

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* Premium Member
2007 SLK55 AMG
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2,714 Posts
My E63 had a 5.5 Biturbo engine and it went 70K miles with no problems...
 

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2019 SLC300
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2,706 Posts
Ok,
2014 SLK55 0 to 60 4.5 sec compare 2018 SLC43 0 to 60 4.6 sec
2014 SLK55 1/4 mile [email protected] compare 2018 SLC43 1/4 mile 12.9 @108
MPG 2014 SLK55 cty/hwy 19/28 compare 2018 SLC 43 20/29

Kind of a close call between the 2
 

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2013 SLK350
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2,196 Posts
Wow a Kleeman upgrade to boot. My only gripe with the 55 is I want a damn shifter something I cant have in a 43 either. That 43 is fast but probably on par with what u have already!!! I think its a 0-60 in 4.5 or so. Needing a manual stick shift sets me back to 0-60 in 5 on the slk 350 so I can live with that. damn mustangs are faster and that kinda cheeses me off so someday I'll supercharge it.
Not sure the M272 (R171 pre FL) / M276 (R171 post FL/R172) can be mated to a supercharger...
 

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* Premium Member 2018 SLC43
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3,727 Posts
Just wondering what people think of the 43. It sure is fast but will it last with all that turbo?
I'm not sure that the Twin Turbo's on the SLC43 are really put under that much stress?
Un-like the 1.4 and smaller Turbo engines that they are putting in large SUV's??

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(Though the SLC43 can be "chipped" to make if considerable faster..!! >> @crispy5974 )
Think the main thing is to change the engine oil on a regular bases & allow the Turbo to cool down after high speed runs, before shutting the engine down.

Reasons to upgrade to a SLC43:
  • Get the newer 9G Fast shifting Gearbox.
  • The Face Lift R172 has newer/different interior.
  • Being MY 2016 to 2019 they will be "newer" in 10 years time.
(Though be careful here in the UK, upgrading to the Final Edition SLC43...)
  • Can be chipped in the future to make it faster than the R172/55...
  • With the low down Torque, feels a lot faster than the R171/350
599402


Some additional upgrade thoughts:
I moved up from a Face Lift R171/350 (305hp) to a MY2018 SLC43 (390hp)
  • Back to back test drive: The 2.0 Turbo SLC300 didn't feel as nice to drive as the NA 3.5 V6 R171/350.
  • The R172/350 in a nice spec is possible a good sweet spot in upgrading from a R171/350.
  • The R172/55 with it's V8 engine sounds best & is the one to go for if the $$$ permits.
 

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I moved from the SLK 350 to the SL400 same engine as the 43 (may be small difference in output?) it’s a really impressive power unit and the 9g transmission is excellent.
on my Scottish tour I saw over 35mpg and I wasn’t hanging about😀
As far as reliability, time will tell, but I think with the right maintenance and mechanical sympathy it should be fine.
Mark
 
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