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M276 Engine?

 
Old 03-04-2013, 06:20 PM
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2014 E63 AMG S
M276 Engine?

Hey,

Does anyone have any (preferably official) information about difference between the M276 in the 2013 C300 and C350? I've heard ranges from it being all software, to the difference being deeply mechanical (port sizes, quality and strength of materials). Does anyone know?

Thanks
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Old 03-04-2013, 09:58 PM
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2013 C350 Coupe, 2005 C230K Kleemann Sedan
Originally Posted by JaredP View Post
Hey,

Does anyone have any (preferably official) information about difference between the M276 in the 2013 C300 and C350? I've heard ranges from it being all software, to the difference being deeply mechanical (port sizes, quality and strength of materials). Does anyone know?

Thanks
The big difference for MY2013 is the eco start/stop function
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Old 03-04-2013, 10:09 PM
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Originally Posted by capt_paul View Post
The big difference for MY2013 is the eco start/stop function
I'm not really concerned with the differences between the M276 and engines in <2013 C's, but the difference between the M276 in the 2013 C300 and 2013 C350.
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Old 06-04-2013, 10:27 PM
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2013 C350 Coupe 4M
Looking here: http://en.wikipedia.org/wiki/Mercedes-Benz_M276_engine underneath specifications it says there is only one version with a displacement of 3.5 litres. This leads me to believe the C300 uses a different engine? Perhaps the older M272? http://en.wikipedia.org/wiki/Mercedes-Benz_M272_engine check under the "E30" section.
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Old 06-04-2013, 10:39 PM
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2010 C300 Sport
The 2013 C300 4Matic uses a detuned 3.5L CGI M276 engine with direct injection. This is clearly stated in all MB websites worldwide where the C300 4Matic is sold. However, China still offers a C300 with the 3.0L M272 engine.
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Old 06-04-2013, 11:21 PM
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Would the detune be software only and or different heads, for example?
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Old 06-04-2013, 11:33 PM
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Rumor has it that the detune to 248 HP and 251 lb-ft torque (from 302 HP and 273 lb-ft) is all ECU programming. Many have speculated that this engine can be retuned to full spec.
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Old 06-05-2013, 08:52 PM
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Originally Posted by Acapulco Bill View Post
Rumor has it that the detune to 248 HP and 251 lb-ft torque (from 302 HP and 273 lb-ft) is all ECU programming. Many have speculated that this engine can be retuned to full spec.
That would be awesome.
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Old 06-05-2013, 09:33 PM
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I'm a bit anxious because no one has offered a tune yet, and it's been nearly a year. You would think if it was as simple as a retune, it wouldn't take this long.
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Old 06-07-2013, 02:49 PM
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C300 GDI Tuning

Originally Posted by JaredP View Post
I'm a bit anxious because no one has offered a tune yet, and it's been nearly a year. You would think if it was as simple as a retune, it wouldn't take this long.
We have a tune available for your car: http://oetuning.com/mercedes-benz-c300-3-5-gdi.html

Feature of the tune include:

- Ignition and Fuel adjustment
- Speed limiter removal
- Improved throttle response
- Raising Torque limits

Gains are +12Hp & +10Tq. On SALE this month for $556, ECU send in only.
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Old 06-07-2013, 03:16 PM
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Originally Posted by [email protected] View Post
We have a tune available for your car: http://oetuning.com/mercedes-benz-c300-3-5-gdi.html

Feature of the tune include:

- Ignition and Fuel adjustment
- Speed limiter removal
- Improved throttle response
- Raising Torque limits

Gains are +12Hp & +10Tq. On SALE this month for $556, ECU send in only.
Maybe a tuner can give me some insight. Why isn't there +50hp and +20Tq gains, if it is the same engine as the C350?
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Old 11-19-2013, 05:35 AM
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2013 C300 4MATIC Sport
Originally Posted by JaredP View Post
Maybe a tuner can give me some insight. Why isn't there +50hp and +20Tq gains, if it is the same engine as the C350?
I'd be interested in this as well, especially since Kleemann's C350 tune for the M276 is completely compatible with the C300 ECU.
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Old 11-19-2013, 12:36 PM
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OE Tuning C63 AMG
C300 Tuning

We are looking for a local SoCal car to show dyno results for >2012 C300 GDi.
Please PM for the full details of the deal. Only 1 car needed.
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Old 11-20-2013, 03:25 AM
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Is it possible Mercedes is trying to limit the power and torque going through the W204's 4matic system?
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Old 12-28-2013, 11:11 PM
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2014 C300 4matic
Originally Posted by mac911 View Post
Is it possible Mercedes is trying to limit the power and torque going through the W204's 4matic system?
I think that's unlikely because you can configure a C350 coupe with 4matic as an option.

Also, I found this on Kleemann's website:
Will the 7G-tronic be able to handle the power of a Kleemann tuning solution? Back to top
The 7-speed 7G-tronic transmission (722.9) has now replaced the most of the 5-speed (722.6) transmissions Mercedes Benz used since 2000. All new N/A V6 and V8 vehicles are now being built with the WA700 variant of the 7G-tronic. The WA700 variant is endurance load rated by Mercedes Benz at 760 Nm (560 lbs/ft) of torque. This means the transmission will handle this amount of power continuously with out failure. There will never be a time where one can develop this kind of power continuously on the road. Momentary load ratings are easily 35 % higher than continuous ratings, and the 7G-tronic transmission will easily handle the performance from a Kleemann conversion. The 7G-tronic has been available since 2004, and Kleemann has modified many of these vehicles. None of these modified vehicles has had any trouble to date, many of them having logged in excess of 64000 km (40000 miles).

http://www.kleemann.dk/About/FAQ#faq05

Last edited by WhyAskWhy; 12-29-2013 at 08:17 AM.
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Old 03-17-2019, 02:20 PM
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2013 C300 4matic Sport sedan
Bumping this thread. Anybody get anywhere with this? I saw another thread similar to this offering a tune for $1300. All subsequent posts could not provide any real data.
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Old 03-17-2019, 08:18 PM
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Originally Posted by StevilKnievel View Post
Bumping this thread. Anybody get anywhere with this? I saw another thread similar to this offering a tune for $1300. All subsequent posts could not provide any real data.
Didn't bother reading the posts but the only difference is that the c300 is electronically detuned. An ECU tune will bring it up to c350 spec and then some. (~330hp).

Eurocharged is a good option and I'm sure OE tune has sorted theirs out as well.
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Old 03-17-2019, 08:44 PM
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Originally Posted by Adi-Benz View Post
Didn't bother reading the posts but the only difference is that the c300 is electronically detuned. An ECU tune will bring it up to c350 spec and then some. (~330hp).

Eurocharged is a good option and I'm sure OE tune has sorted theirs out as well.

Yeah I'm aware of the difference/similarity of the m276 in the my13 and my14 c300's and c350's. I'm just wondering if anyone has actually got provable results. I checked out a company called Bren Tuning. They have a video of a 3.5L c300 4matic with baseline results. I've contacted them for some more info, waiting for reply.
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Old 03-17-2019, 10:52 PM
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2014 C350 Sport
Does C300 version specify regular gas? That could be a part of the difference since C350 requires premium to make rated HP.
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Old 03-17-2019, 11:14 PM
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Originally Posted by Tom in Austin View Post
Does C300 version specify regular gas? That could be a part of the difference since C350 requires premium to make rated HP.
The 2013 C300 does require high octane pump gas. 100%
Pretty sure most all modern MB motors do, in U.S. spec. Europeans have higher standards of petrol than we do so when their engines are designed they are designed with a minimum octane rating, which is typically standard pump gas over there but mid grade/premium over here. There's a lot of info out there regarding this. The consensus is that the m276 engines in 2013 and 2014 c300's are identical ( so far I can verify that bc every part I've needed I had to get was the same as the c350 ) and it's just a factory "de-tune" done to the ecu that makes them differ. The problem is, I've searched ad nauseam and have not found ANY verifiable numbers. Not from customers or the various tuners that offer the service to these very specific engines.
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