1guitar

Up thru 2019 the standard engine in the E300 was the 4 cylinder gasoline powered engine
designation: 274.920. Does anyone know what the engine designation is for the 2021 E350 is?

ua549

AFAIK MB is using the M264 engine with EQ Boost. The M264 was released in 2017 in the home market. It replaced the M274 engine.

If you don't have EQ Boost in your market the engine is still the M274.

1guitar

Thanks for the reply. Could you please expound upon your answer. I am unfamiliar with the M264 engine, is it a normal 4 cylinder engine with some type of auxiliary battery power? Also I now have a 2019 E300 and it has a 274.920, you mentioned the M264 engine was released in 2017, was it used in a different model of MB. Thanks

ua549

The M264 engine is a 4 cylinder version of the M256 I6 engine used in the E450, E53, etc. In other words it has EQ Boost, MB's name for the mild hybrid technology it uses.
Engine use varies by marketing region. I do not believe it is offered in the North American market yet. Look for info on Mercedes-Benz EQ (ev), EQ Power (phev) and EQ Boost (mhev) technology.

1guitar

Thanks

Mikey53

Based on mbusa.com, the E350 engine (4 cy) does not have EQ boost. Other markets I have no idea.

CarFan1

This is inaccurate. Since 2019 the entry level engine in E-class sedans sold in the US is the M264 without EQ Boost. This engine is rated at 255 HP which is higher than the 241 hp of the M274 prior to 2019. Outside of the US market, the M264 engine is frequently paired with EQ Boost and is capable of even higher performance consequently. Unlike the M274, the new engine features twin-scroll turbochargers and other modifications including more stringent particulate filters. Notably the M274 is still sold outside the US market in E-class sedans (and coupes) and in the those markets is now paired with EQ boost rated at 255 hp which may have lead to the confusion as to which engines are offered in the US (since the 2019 US engines are also rated at 255 hp).

ua549

My info came from Daimler.com and was not specific to the North American market. The M264 (i4) and M256 (i6) use many of the same parts and are tightly related.

chassis

The M264 4 cylinder is also used the current C 300 and V167 GLE 350.

evd22

It's a bit weird in that the MBUSA website lists E350 with a compression ratio of 10.5:1, which indicates the use of the newer M264. But the engine output is 255hp which is inconsistent with the numbering scheme around the world because that is E300 level power (in australia, germany, anywhere).

A badge of 350 indicates power of around 300hp, which was found in the initial CLS350 released a few years ago, powered also by M264 at 299hp. However by now this tune seems to have disappeared altogether across the range, around the world. Quite peculiar.

ColeBlooded

The naming schemes are so confusing these days.

evd22

It's always been confusing after the dark age where displacement alone determines output. Right now, for petrol models the badge number is around 30-80 above the actual output in hp. For diesels it's a bit more complicated, as the difference between badge and hp numbers tends to be wider for engines with more torque.

murman

I'm so confused. Weren't the badges back in the day supposed to designate displacement, and not horsepower? I know the companies got away from truly tying displacement and badging, but never thought it had anything to do with HP, or supposed HP for that matter.

1guitar

I believe at some point MB decided to name the cars within a variant, say the E class, what they simply wished to imply and threw the actual displacement of the engine out the window. The current engine in the North American variant really should be the E200
as the actual size of the I-4 is closer to 2 liters than 3.5. MB has imo completely lost touch with their market share and their obvious desire to manufacture a car for everyone is in tatters as evidenced by what they’re building now. A well equipped C class car is just south of $50k,
it’s simply not worth it. The only car (not suv)
that is remotely a worthwhile candidate to own is the “S” class cars that are coming but their pricing is beyond any realm of sanity. I haven’t seen the S class DOG for 2021 but I’d bet the S500-4matic with a few options will list for around $110k-$115k and for that kind of money you get a whopping 6 cylinder engine! IMO when you’re thinking about spending north of $100k for a car it sure better be worth the money. Given MB pricing and their true distance from the folks buying their cars I will be looking at an Audi for my next car.

evd22

Taking E class as an example, up till W211 and early W212 the number corresponded to displacement, and larger engines tended to have more power. Over the past few years, perhaps due to the pace of engine development picking up and emission regulation, you start having newer engines with same or smaller displacement but with the same power level, meaning that sticking to badging with displacement would make very little sense: the W213 E300 with I4 these days make similar amount of power and torque as the W212 E300 with V6. As a rule of thumb 200 usually has 135-145kw, 250 155-165kw, 300 180-190kw, 350 215-225kw, and 400 245-255kw.

ua549

My '72 280 SE (W108) had a 4.5 liter V-8 engine. The prior year the same model had a 3.5 liter V-8 engine. Finally the model name was changed to 450 SE.

kajtek1

I was typing response to topic in W212 section and the script placed it in W213 section topic.

Tom in Austin

Model nomenclature is a lot of happy nonsense now ... when Mercedes rolled out the W213 and changed to a 4-cylinder engine, they called it an E300 to make it sound like it was similar to a W212. Same with the new C class where the four cylinder model suddenly became a C300 instead of a C250.

With the goofy model numbering, emphasis on turbocharging and horsepower, and a big black plastic cover hiding the engine, they hoped buyers wouldn't know the difference!

mercedes.fan

In europe its the m264 with eq boost that is sold since 2020 on all gas models, even the e200 tuned engines. My 2019 uses a m274 without any electrical stuff. In europe the e300 is rated at 255 hp and e350 is rated at 299 hp, all the same engine