Choosing between a C63 and a CLS63
Thread Starter
Super Member
Joined: Sep 2021
Posts: 534
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From: Ann Arbor, MI
2004 SL600
Choosing between a C63 and a CLS63
I recently had the chance to drive a 2007 CLK63 and really liked the engine for its NA power and revving.
Therefore, now considering buying something with the M156 engine, especially because it is supported by HP Tuners (which I am very familiar with on GM cars).
Locally there is a 2007 CLS63 which appears in very good condition; never driven in winter here, but with 140K miles. Asking $11K.
Also a modified 2010 C63 with P31 package, a EuroCharged tune, TCM tune, headers and other upgrades. Rebuilt title with 115K miles. Asking $17K. I saw the before picture; front end damage.
I noticed that the CLS63 is rated at 507HP while the C63 is rated at only 460HP (or so). I assume the engine is the same and the C63 is simply detuned for marketing reasons to get people to spend more money for a CLS63 . (Or a C63S ??)
I also PM'ed @hachiroku some questions about overwriting the existing tune with his own.
I welcome all thoughts and hope to join the M156 community soon.
Therefore, now considering buying something with the M156 engine, especially because it is supported by HP Tuners (which I am very familiar with on GM cars).
Locally there is a 2007 CLS63 which appears in very good condition; never driven in winter here, but with 140K miles. Asking $11K.
Also a modified 2010 C63 with P31 package, a EuroCharged tune, TCM tune, headers and other upgrades. Rebuilt title with 115K miles. Asking $17K. I saw the before picture; front end damage.
I noticed that the CLS63 is rated at 507HP while the C63 is rated at only 460HP (or so). I assume the engine is the same and the C63 is simply detuned for marketing reasons to get people to spend more money for a CLS63 . (Or a C63S ??)
I also PM'ed @hachiroku some questions about overwriting the existing tune with his own.
I welcome all thoughts and hope to join the M156 community soon.
MBWorld Fanatic!
Joined: Dec 2005
Posts: 4,057
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From: NJ
2009 SL63 AMG
I recently had the chance to drive a 2007 CLK63 and really liked the engine for its NA power and revving.
Locally there is a 2007 CLS63 which appears in very good condition; never driven in winter here, but with 140K miles. Asking $11K.
Also a modified 2010 C63 with P31 package, a EuroCharged tune, TCM tune, headers and other upgrades. Rebuilt title with 115K miles. Asking $17K. I saw the before picture; front end damage.
Locally there is a 2007 CLS63 which appears in very good condition; never driven in winter here, but with 140K miles. Asking $11K.
Also a modified 2010 C63 with P31 package, a EuroCharged tune, TCM tune, headers and other upgrades. Rebuilt title with 115K miles. Asking $17K. I saw the before picture; front end damage.
If you're planning on building a track toy, the C63 has some advantages.
But outside of this, and especially between those options, that CLS63 seems like a cleaner car and a much better buy.
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'12 C63BS "SlickTop", '08 CLK63BS, '16 E63S wagon, '12 CLS63, amongst other non-Merc toys
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From: Worldwide
2007 Mercedes E63 AMG
here was my response.
Hi Ted, Thanks for reaching out. Luckily I was logged in and saw this message. I haven't been frequenting MBWorld for a few months now.
If you have any further questions feel free to reach out directly through our Instagram @eightysixtuned or by email info@eightsixtuned.com .
Hi Ted, Thanks for reaching out. Luckily I was logged in and saw this message. I haven't been frequenting MBWorld for a few months now.
- The tune would be tuner locked
- We only use HP Tuners because ease of building new files by hand versus other software packages. HP Tuners isn't the ideal tuning situation, it's just what works for us for now.
- Our tunes are not recommended or compatible with TCU tunes
- Our ECU tune will overwrite any pre-existing tune
- The C63 aside from the 507 edition, their factory tunes limit power. When tuned, all power would be unlocked.
- The C63 and CLS63 are quite different animals.
- The C63 is lightweight and tossable due to weighing 500lbs less.
- The CLS63 is a grand tourer with power and great styling.
- The top M156 engines are the dark intake manifold versions with forged pistons.
- These come in the SLS AMG versions and C63's with the P30 or P31 Performance Pack depending on year and country. 507 Edition vehicles included.
If you have any further questions feel free to reach out directly through our Instagram @eightysixtuned or by email info@eightsixtuned.com .
Last edited by hachiroku; Jul 7, 2025 at 10:26 PM.
