Cylinder shutdown works as claimed - Mercedes Benz SLK Forum

AMGs For those high performance Mercedes-Benz R170/R171/R172 cars tuned by AMG

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#1 Old 08-16-2016
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Cylinder shutdown works as claimed

This is from my commute in this morning. I'm impressed!

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#2 Old 08-16-2016
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Yup! 22 hours, with a few extended periods in bumper-to-bumper traffic jams.
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#3 Old 08-16-2016
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Yup, it is impressive. I have seen 34mpg. Never would have dreamed of that in my R171.
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#4 Old 08-16-2016
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...and the transition back to 8-cylinder operation is fast (~30ms) and nearly undetectable when you accelerate. Have to admit, though, that I'm not a fan of the exhaust note in 4-cylinder mode. The active flaps make it sound like it's strangling.
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#5 Old 08-16-2016
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Coupled with that is the off/on when in comfort mode. Amazing how seamless that is when the light turns green. I am one super happy camper.
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#6 Old 08-16-2016
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Yeah, it does sound a bit weird in 4 cyl mode. However, with that kind of MPG, I'm pretty happy to tolerate it!
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#7 Old 08-19-2016
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Well, I managed to top even that number. Showed 30.3 mpg for the ride in this morning. Really amazing to have a NA car with these power levels get fuel economy that well. Last big V8 I had was a 1995 Z28 Camaro 5.7L. It made 275 hp and maybe got 20 mpg on a long ride. I put headers, nitrous etc on it, so I eventually probably got it up to around the 400 hp mark, but that was only on the juice. Now I've got a car that makes more power (bone stock!) and gets 10 mpg better. Wow.
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#8 Old 08-19-2016
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thought I'd try and drive with efficiency in mind on a couple trips to work, 25 miles each way includes motorway A and B roads, was very difficult to do. Anyway, on both journeys got above 32mpg, which as above is really impressive.

Anyway, normal service resumed, that sound and acceleration far too addictive to be worrying about economy .

One thing I have noticed since getting this car, is other drivers coming up pretty quick and close to the rear. Is that to egg me on, or to try and hear the noise??
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#9 Old 08-19-2016
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Yeah, I've noticed the same. I think it's because there's so little car behind the back seat that they seem closer than they do with a 4 seater. Still feels like they're trying to breed my SLK though!
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#10 Old 08-19-2016
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My friends at work named my car "the UFO" because none of them had seen one before and didn't know what it was (SLKs aren't very common back in Connecticut). Some of the drivers trying to climb into our trunks/boots may just be getting close enough to read the badges.
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#11 Old 08-19-2016
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Cool

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Originally Posted by LeonardoDaBenz View Post
Coupled with that is the off/on when in comfort mode. Amazing how seamless that is when the light turns green. I am one super happy camper.
No good going up and down the DVP or Yonge St though....I only turn the 'eco' on when I am on a long cruise..other than that it's 'S'

BTW hopefully you will join us soon for a get together.
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