S600 Biturbo MPG

[biturbo]

Here is my MPG for my S600, mix of motorway and town driving.
I don't think the revs went above 2k though :-}

Best ever was 29 mpg for 80 miles of pure motorway once.

Thing with the S600 is when your sitting in traffic for only 2 mins mpg drops so much, it still has to feed those 12 cylinders.

 

[Shude]

That's good but I reckon 30mpg is achievable if you really tootle it and just tickle the gas pedal. Leave huge gaps between you and the car in front, resist braking if possible and by that I mean if someone in the distance brakes you immediately lift off the gas pedal just in case.

If you hear about some clown in a MB doing 50mph on the motorway and causing a tail-back it's probably me trying to bust my previous record of 31.6

 

[st4]

Best ever in 500 V8 cars was just over 30mpg. I'd take this every time.

 

[A210AMG]

I thought (at least on the v8) you could have the option that shuts half the cylinders down? so it saves fuel. Seem to Remember my old boss having it on an S500L he owned.


30mpg must be possible

 

[jaymanek]

So its out of the workshop then?

 

[steve333]

Have never achieved 30mpg in my cls500,27.4 at best,12 at worst

 

[Silver CL55]

have never achieved 30mpg in my cls500,27.4 at best,12 at worst

+1

 

[Setanta]

I had my W220 S600 down in single figures in London

 

[biturbo]

yeah out of work shop.

But then back in again tomorrow,
Gasket leaking between manifold and turbo. Engine out job. 12 hours labour.
Ow the love of owning a S600.

 

[Setanta]

Sorry to hear that :-(

 

[biturbo]

its all due to the badly fitted turbo in the first place.

 

[W220alter]

Thing with the S600 is when your sitting in traffic for only 2 mins mpg drops so much, it still has to feed those 12 cylinders.

When standing the S600 switched off 6 cylinders. My 04 S600 makes 25.6 on a motorway and it does not matter I drive 60, 70 or 80; it is always the same figure. In town it sucks.

 

[drabux]

When standing the S600 switched off 6 cylinders. My 04 S600 makes 25.6 on a motorway and it does not matter I drive 60, 70 or 80; it is always the same figure. In town it sucks.

In two weeks of ownership and about 1000 miles, I've been pleasantly surprised by the 'economy' on a run. I've found that as the speed goes up, the consumption relative to other cars improves. What a great selling point for the twin turbo!

Today I was cruising at around 100 mph (on my private test track) and managed 22.4 mpg. As others have said, at lower crusing speeds it does not seem much more frugal. I've also found that on long down hill runs with the throttle off, fuel consumption does not increase as fast as on many cars and I wonder whether MB cuts the injectors when there's no throttle.

I also thought that the running on 6 cylinder feature was deleted prior to the twin turbo.

Alanb

 

[Dieselman]

I've also found that on long down hill runs with the throttle off, fuel consumption does not increase as fast as on many cars and I wonder whether MB cuts the injectors when there's no throttle.

I also thought that the running on 6 cylinder feature was deleted prior to the twin turbo.

You are probably correct, otherwise horrendous turbo lag would result. Afaik, all petrol engined cars with Cats don't employ over-run shut-off to keep the Cats fed with fuel.

 

[biturbo]

went from chester to liverpool on mothersday and got 31 mpg 30 miles trip.
I was totally cruising. At the start i was doing 38 MPG !!!!!!!!!!!!!!!! for a downhill stretch of motorway for 5 miles wtf.

 

[Dieselman]

At the start i was doing 38 MPG !!!!!!!!!!!!!!!! for a downhill stretch of motorway for 5 miles wtf.

There is a clue there...

 

[mirras]

I thought (at least on the v8) you could have the option that shuts half the cylinders down? so it saves fuel. Seem to Remember my old boss having it on an S500L he owned.

Which engines in which cars do this?

 

[tpwuk]

^ I know the CL600 and S600 (none turbo) do it and I think it was an the S500 & CL500.

 

[John]

I believe the Chrysler 300C has this ability to run on 4 cylinders instead of the usual 8 as is done automatically IIRC.

 

[Melk63]

I do 200-300 miles a week on A-roads and get 23-25mpg average. This is in a CL600 Biturbo. There are a few roundabouts and junctions in the way that reduce the average speed down to around 45mph. Best ever was 30mpg on a straight line motorway at steady 70mph for about 5 miles. In my previous CL55K i used to get slightly better mpg (2-3mpg up).