Cylinder Shutoff
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).
Last edited by AMGAffalterbach; Apr 22, 2012 at 12:35 AM.
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??




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
Last edited by gaazmon; Apr 24, 2012 at 12:46 PM.
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)
Anybody else??
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.
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

) 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?).
Last edited by PortAxePlayer1; Apr 26, 2012 at 08:47 AM.
Trending Topics
The Best of Mercedes & AMG





