victor.steven

Hi ! can anybody help me ? i just bought a facelift c300 2013 and can anybody give me suggestion about what should i change if i want to jack my car performance ?
Also i want to fit a WALD 2012 body kit. is it fit for the 2013 facelift car ?
please help me thanks a lot

JaredP

Wait for an engine tune for the 2013. The M276 engine in the C300 is identical to the engine in the C350 for the 2013 MY (From the limited information I was able to find). C350 tunes are getting 330HP, So I would assume that if the engines are indeed the same, performance around that mark would be achievable by the C300.

Go Navy

What's involved in a C350 "tune"? Does it void the warranty? Does it screw up the 7 speed automatic?

More HP = good!

JaredP

There is quite a few vendors who do ECU tunes Kleemann, for example. Basically a reprogram of engine control software. It voids the warranty, but generally you can flash back to stock engine software if you ever need to bring your vehicle in for warranty work. Shouldn't have any adverse affects on the trans.

Go Navy

Thanks for the extra info. Right now, I like my C-350's cajones, esp. in S mode. It'll embarrass boy racers and infuriate environmentalists. But knowing there are aftermarket sources to hack the engine control black box is something good to keep in mind.

JaredP

I'm in the same boat. I haven't driven in Sport, or past 4k RPM for that matter, but I know the power is there. Trying to baby it until I've hit 1000 km or so. I do like that fact that I will be able to achieve ~300HP in the future If I want to.

beneliezer

Is the same true of the MY 2011 C300 and C350 engines? Can I get tuned to get as much power as a C350?

Thanks

JaredP

Unfortunately no, they began putting a detuned M276 engine in the C300 in 2013. Further still, I'm not certain if a tune will get MY 2013 C300's up to C350 power, It's just speculation I've heard, that the engines are mechanically the same. I do know that the C350 has bigger brakes, and a second air intake, but I believe in Canadian models, the only difference is the second air intake.

Go Navy

The V6 block was revised beginning with the 2012 models, which is why I didn't buy a 2011. (I always buy low mileage used autos and save a fair amount of money that way.) As of 2012 C class models, at least in the U.S., MB went to a 60 degree V6 and eliminated the balance shaft. I think they also re-engineered the fuel injection. At some point it used to be injected into the air mixture but now it is injected directly into the cylinder combustion chambers. There were other changes for 2012 but I can't remember all of them.

Jared, since my C350 had about 11,000 U.S. miles on it when I acquired it about three weeks ago, I didn't have to worry about break in. Let me assure you that when you are in S mode and you hammer the throttle, this thing will take off like a sailor in the wrong part of town, on shore leave, being chased by the Shore Patrol! You will be very pleased!

Various reviews I read on this engine/tranny combo in the C class report that, although the official factory 0-60mph time is 5.9 sec, some reviewers swear it's faster or actually measured quicker times.....I didn't save all the reports, but I know one guy got 5.7. The coupe is actually slightly heavier than the four door so it might be a tick slower. Anyway, the engine/tranny combo (7 spd auto) is superb in this car for my money.

JaredP

It's odd that the coupe is heavier, any reason in particular for that? I'm really eager to have the engine broken in, to give your analogy a test!

Go Navy

From the 2013 C class brochure the dealer gave me, the C350 coupe has a curb weight of 3,693 lbs, and the C350 sedan's curb weight is 3,616. So, the coupe is 77 lbs heavier. That's not an enormous difference but there it is. Frankly I probably would have bought a coupe if I had found a 2012 C350 coupe, used, before I found my sedan.

I think the coupes are typically heavier because they need more beef in the structure for rigidity.

The heavyweight of the C class is the C300 4Matic, which is 3,726 lbs. That's 110 lbs heavier than the C350 sedan. I would think any handling advantage with all wheel drive would be somewhat offset by that extra weight, but maybe I'm splitting hairs.

drummerdimitri

I own a C300 4matic with the new 3.5L engine and would like to know where/when an ecu tune can be possible. Kleeman should start offering some tuning solutions to the new blueefficiency engines. I cant imagine how beastly the car would become with an ecu remap and a supercharger.

JaredP

Yes I own the same vehicle, I contacted Eurocharged awhile ago about a tune, they said they would have more information in the coming months, but absolutely no information now.

drummerdimitri

These engines have been out for quite some time now. I can't believe how slow these chip tuning companies are to come up with a tune for these engines!

JaredP

Considering the potential of the C300 tune, you could be looking at a 50+ HP gain to put it on par with the C350. Maybe these companies have something else in mind.

Go Navy

My 2012 C350 is a Bluefficiency engine, too, so I will follow this topic with great interest.

Mercifully, my 2012 does not have the irritating, "save the planet" ECO-Stop feature. I wonder if the black box tuners can turn that bit off, for those of you who have it. (Yes, I'm aware there's a button on the dash to turn it off, but it defaults to on when you get back in the car again, because the Nanny state knows best. )

Maybe Eco-Stop has been gifted only to Americans, since we are told to feel guilty about everything. I could probably live with it, but I really don't like the concept.

drummerdimitri

My car didn't come with the ECO start/stop engine option for some reason. I thought this was a standard option on these new engines but I guess I was wrong. Maybe they didn't bring them with such an option because cars are mostly stuck in traffic in this country so the engine would have to turn off and back on hundreds of times on a daily commute making it ineffective. Don't quote me on that though, it's just my guess.

JaredP

I have the ECO feature, and it is not as bad as I thought. It only "turns on" when the engine is up to temperature, and major heating/air conditioning isn't being used. I can't even notice it happening, the engine is back on before I can move my foot from the brake to the gas. Even if you need power assist steering, the engine will light back up to assist in fractions of a second. I do question how much the constant on/off actually saves me in fuel, however.

Acapulco Bill

M276 C300 tuning can be performed by Kleemann, here is their link:

http://www.kleemann.dk/Performance/Engines/350V6BE_M276

JaredP

Well, I sent them an email awhile ago about the C300... This is what they sent back. Maybe someone can translate for me, but it doesn't look too good.
And their reply:
I'm not sure what to think.

ghiaguy

Mixpower

A C350 is a 3,5L a C300 is a 3,0L that's a very big difference!

JaredP

The 2013 C300 and C350 have the same direct injection 3.5L

beneliezer

I had a GLK350 loaner with the ECO feature. I agree its barely noticeable. Very nice feature actually. Saves on a lot of gas. I was surprised at how seamlessly they implemented it.