C300 vs C400 4MATIC
I ordered the Acoustic Glass option, and my car will as i understand it, be one of the first to get it. So there are no live reviews yet for this option.
My car is being built today, by current plans, it should be rolling off the assembly line at 20:38 (in 4 hrs from writing this!)
Everybody is welcome to their opinion & preference. Saying there is no difference is however plain wrong.
There is a real difference in the engine sounds at idle, from outside the car, and during acceleration ... where the 4 can sound a bit raspy opposed to the much deeper sound of the V6. The 6 is a smoother and more robust engine, but interior noise is not a serious issue with either model.
I wouldn't base the difference in these two models on sound. Neither as quiet as a Buick or Lexus LS, but good for the class.
Speaking of acoustic glass, for anyone with a C class, do we get that in USA? I know there no option or mention, but the window should have code in stamp for it being laminated AG, or on top of window when roll it down a bit, would feel it have have a small a ridge on top, not rounded. ????
Last edited by floridadriver; Dec 3, 2014 at 11:30 AM.

EDIT ~ BTW this was an Exclusive RWD with Airmatic.
Last edited by Glyn M Ruck; Dec 3, 2014 at 11:32 AM.
EDIT ~ BTW this was an Exclusive RWD with Airmatic.
Last edited by floridadriver; Dec 3, 2014 at 12:39 PM.
The Best of Mercedes & AMG

That said many motoring scribes from around the world & here have made a similar observation to me. We have plenty of experience with this engine from the B Class.
Another thing I noticed yesterday was how much noisier the engine sounds externally once the Airpanel grill opens. It's DI character becomes very obvious. On Alexandra's car the left side of the panel lags the RHS on opening. Things like that drive me nuts.
I should warn you that I'm extremely anally retentive when it comes to cars & audio.
Last edited by Glyn M Ruck; Dec 3, 2014 at 12:54 PM.

I ordered the Acoustic Glass option, and my car will as i understand it, be one of the first to get it. So there are no live reviews yet for this option.
My car is being built today, by current plans, it should be rolling off the assembly line at 20:38 (in 4 hrs from writing this!)
Windshields are always laminated BTW..

http://www.edmunds.com/mercedes-benz...road-test.html
"Is It Worth Stepping Up to the V6?
The turbo four-cylinder blends power and fuel economy in a lightweight package, making the C300 4Matic feel like a proper small sport sedan. But the smaller engine is less charming under heavy acceleration, when quick sprints to highway speed generate a raspy racket under the hood. Although the cabin is nicely insulated from road roar, the noise of a four-cylinder under hard labor still sounds out of place in a Mercedes. It's a reality we're adjusting to as nearly all small turbo engines, luxury badge or not, share this characteristic.
But these are isolated moments. For most buyers, the C300 4Matic is the right combination of performance and efficiency, with sprints from zero to 60 mph requiring just 6.5 seconds during our testing. The V6 holds the advantage of power and refinement, at the expense of slightly more dulled handling. We also found the seven-speed transmission more prone to low-speed lurching while decelerating and braking when paired with the V6."
BTW there is a software patch coming/or available that changes the tranny behaviour under braking.
EDIT: Interestingly our local motoring press finds the 7 speed more settled behind the V6 & the ride more planted. Most of our W205's sold are RWD it should be noted.
Last edited by Glyn M Ruck; Dec 3, 2014 at 01:21 PM.
http://www.edmunds.com/mercedes-benz...road-test.html
"Is It Worth Stepping Up to the V6?
... the smaller engine is less charming under heavy acceleration, when quick sprints to highway speed generate a raspy racket under the hood. Although the cabin is nicely insulated from road roar, the noise of a four-cylinder under hard labor still sounds out of place in a Mercedes. " [B]





I mean these cars are not AMGs, Ferraris, or even the Jaguar F Type R - those have tuned systems designed to actually sound great. Everything else is not really part of the equation, not really a part of the buying decision.
I mean these cars are not AMGs, Ferraris, or even the Jaguar F Type R - those have tuned systems designed to actually sound great. Everything else is not really part of the equation, not really a part of the buying decision.
Last edited by c4004matic; Dec 3, 2014 at 03:29 PM.

Like my friend Mr Ruck I am very sensitive to these sorts of things and refinement is one of the primary reasons for my interest in Mercedes.
Last edited by MBNUT1; Dec 4, 2014 at 09:21 PM.
Like my friend Mr Ruck I am very sensitive to these sorts of things and refinement is one of the primary reasons for my interest in Mercedes.
That is, of course, just my opinion. You may not like the sound, or the performance this engine offers.
I haven't driven the C400, but the reviews I've read about the engine (possibly brief drives in other MB models) seemed split on the quality of the engine. Some say it's very smooth, some say it's surprisingly coarse and kind for unpleasant for 6-cylinder engine.
IMO, the difference btw a decently refined 4-cylinder and a kind of coarse V6 are not that substantial, esp if the 4-cyl version costs a less and gets better mileage....
My daily driving doesn't require much strong acceleration. The 4-cyl works just fine for these relatively low stress situations....

The M276 does make some typical DI noises but it is smooth.
The M272 DOHC & it's predecessor the M112 SOHC are utterly smooth & quiet. They idle without a shake as well.
None of them protest when driven hard either & are willing to be revved.







