AMGAffalterbach

Hello all,

I had a quick question regarding my 2007 E550 4Matic with the M273 (E55) engine, and perhaps any other W211 that has been produced. From previous knowledge I know 2007/2008 was the widespread implementation year among several brands for engine cylinder shut off - does the W211 have any such feature? I searched around quite a bit and didn't find a definitive answer - when (or even if) did Mercedes introduce such technology? From other threads it seems to be that the answer is no.

After driving between Highlands Ranch and Boulder (no, not for 4/20) a few days ago I was one mark above a quarter tank after driving about 120 miles that day mostly highway - pretty satisfactory as the information center estimated about 24 miles per gallon (not bad for a V8 and cruise control).

PortAxePlayer1

To My Knowledge All V12 Engines And a V8 Had This Feature, Starting In 1999 with The CL600, S600 and CL500. I never heard that the M273 or M272 had Cylinder Deactivation though.

PlatinumPi4u

I know that my w211 e500 sport has the S/C button near the shifter. C is supposed to start you out in 2nd gear from a stop, whereas S starts you out in first... and thats all she wrote.

However, while trying to accelerate on the freeway, it does feel if its in C mode (comfort) that the air fuel, or cylinder, or ??? is turned off, because the throttle response is definitely not the same as when it's in S (sport) and trying accelerate...

It feels like theres a differences, however when left on cruise control, and toggling between C / S, the RPMs don't really move (roughly 1200 rpm @ 65)

So no definitive answer here from me, except to say I feel a more dramatic fuel curve in Sport mode, as if 8 cylinders are going instead of say 6.

Anybody else??

gaazmon

the cylinder shut off was only on the 2000 - 2002 S600 and CL600. feature was removed once the bi-turbo V12's were implemented for MY2003.

the s/c is sport/comfort. in comfort, the car will start off in 2nd and also the shift points will be at lower rpm for smoother/more relaxed ride (originally was labelled W for wet as in for bad weather conditions to prevent loss of traction). in sport the car starts off in 1st and will have higher shift points for more "spirited" driving (love that word, spirited )

these cars get great highway mileage all around. i've made it to vegas and back (600 miles for me) on one tank, granted i did not hit traffic either way, so their great. autobahn designed hehe

jcat

this feature has more to do with the mapping of the electronic throttle curve than anything, besides the fact that it starts you in 2nd rather than 1st.

AMGAffalterbach

Thank you all for your replies. And yes I was aware of the Comfort/Sport transmission manipulation which is certainly nice to have. I generally drive in comfort mode with my Airmatic set to Comfort as well, but when I find a fun road or need to drive "promptly" (not that I would ever violate state/federal law ) it's nice to put it into sport and stiffen up the struts. I just feel it puts less wear on the car and helps with fuel economy when the RPMs are kept down and the shocks aren't as hard thus transferring less force to various structural elements in the cabin, but I don't know how well this belief is rooted in fact.

As far as the cylinder deactivation, that's what I had thought - I am certain now that the M273 does not have it but I researched it a bit more and it was in the early 2000s Mercedes used this on only a few engines but it never proliferated throughout the model line. I wonder why, but I am sure there is a reason, probably for reliability or other issues (maybe cost cutting?).

PortAxePlayer1

Cylinder deactivation is gaining back lately, the AMG engine in the 2012 SLK55 is based on the new M152 engine and has cylinder deactivation.

irondad

Wait... did I read that right... you dropped an E55 engine in an E550??

AMGAffalterbach

Oh no, no, no. I have the stock M273 V8 engine in my E550 standard on W211s of this specification. The M273 came in two variations with different "model" variations the E47 (the 4.7-liter used in the ML and S class models) and the later E55 version which is the 5.5L V8 found in the 2007 E550 and similar applications. It is just the specific version of the engine. I wish I had that expertise though

Fulani Filot

Have you heard of any V6 or V8 for 2012-2017 models, has gotten the cylinder shutoff feature? I'm curious. Thanks.