Vegas Benz

https://www.fueleconomy.gov/feg/bymo..._S-Class.shtml

2021 S500 20City /29Highway
2021 S580 17City /25Highway

js_cls

Impressive MPG for the S500.

MTrauman

Interesting! My '19 AMG S63 has better numbers at 17 City and 26 Highway than the S580. Not that I bought an S63 for gas mileage but interesting none the less.

RGS

I assume the S580 has a beefed up version of the previous S560 V8. What is the S500 based upon(6 cyl or 8cyl)?

Vegas Benz

the S500 is a 3L 6 cylinder.

Sean._.S

I have a question... Is it possible to buy a fully optioned S class with the 6 cyl? (S500). Those figures shown above are quite tempting, though, it seems like it may not be possible to option the S500 as well as the S580.

Nonformulaic

It is, yes, I believe. You start out with base leather….and somewhat different wheels. I think that “executive” package isn’t option-able. As a footnote, oddly, the S500 has a slightly higher residual than the S580.

Also, if you read closely….both models have mild hybrid….but the S580 does not have the A/C compressor on electric. The S500 does. Interesting.

Vegas Benz

the new S-Class has 3 basic versions, Luxury, AMG (cosmetic, not a modded engine), and Executive. The S580 can be ordered in all three versions, but the S500 is not available in the Executive version.

One of the features I want is the rear wheel steering assist. On the AMG build it gives 4.5 degree assist (available option on the AMG), and 10 degree (available option) on the Executive build. All of the articles and youtube videos talk about how much the 10 degree helps, but nothing is ever mentioned about the 4.5 assist???

The Mercedes Benz USA website has a "build" tool with 2021 prices. It is helpful, but it doesn't seem to have all of the options like 3D technology (which I was able to order at the dealer in May).

Back to the MPG, the S500 states 429 HP which is plenty for me. If those figures are accurate I would be very OK with that, but my 2021 GLE450 is supposed to get 21/26 and at 1,500 miles, my average now is 18.8 (I never reset it). My previous car was a 2016 Jag XF which was rated at 340 HP and 20/30, and that MPG was very accurate. I am hoping the S500 is close to it's estimate.

The info I gathered is for USA builds. I seen the S-Class packaged differently in other countries.

Vegas Benz

what does that mean in practical terms? which is better?

haYnBenz

If the AC compressor is not electric, then the engine will need to power it, even when the car is running on electricity from the hybrid battery (e.g., at stoplights and while coasting). With the S500, the car's engine will be off as you coast to a stop and while at a stop. With the S580, the engine must always be on to power the AC compressor. In some BMWs, the engine would be off at a stop light then spontaneously start when the AC compressor needed power (i.e, as the cabin heated up) if the waiting was too long. Quite irritating and not very "luxurious". I'm not sure if the S580 would be the same but that would explain it's significant MPG delta from the S500. I can't say enough good things about the S-Class mild hybrid setup, having owned several cars so equipped.

Vegas Benz

If you drive 10,000 miles a year,
S500: 10,000 / city MPG 20 = 500 gallons. 500 gallons @ $4.50 a gallon = $2,250 in gas.

S580: 10,000 / city MPG 17 = 589 gallons. 589 gallons @ $4.50 a gallon = $2,651 in gas.

Premium gas in my area averages $4.36/gal. For my example I bumped it to $4.50 and assumed the lower all city MPG. Even so, the difference would be about $401 more a year to drive the S580 if you drive 10,000 miles a year, and since I retired I drive a lot less. For less the $400/year extra, I don't find it to be a deal breaker.

emilner

What's amazing to me is how full size V8 sedans have had basically the same gas mileage (17/25) for past few decades. Through all the tech advancements there doesn't seem to be an improvement (probably related to content/weight add ons plus more hp).