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Mercedes F125 Fuel Cell Concept
Mercedes F125 previews styling of the next generation S- and CL-Class luxury vehicles

While most auto manufacturers are pushing ahead with hybrid, diesel, and electric powertrains as an alternative to gasoline engines, Mercedes-Benz still has a sweet spot for hydrogen fuel cell vehicles. The latest hydrogen fuel concept from Mercedes is the F125 that will debut this week at the Frankfurt Auto Show. 

According to information leaked to, the F125 gets it motivation from a hydrogen fuel cell stack that is paired with four electric motors. Total system output is a relatively meager 231hp. However, that is enough to push the lightweight concept to 60mph in just 4.9 seconds, which is nothing to scoff at. 

With a full tank, the F125 can travel up to 620 miles, while the electric-only range is 31 miles thanks to an onboard lithium-ion battery pack. Top speed for the concept is 136 mph.

The Mercedes F800 Style concept last year previewed the design direction for the production second-generation CLS sedan. According to Motor Authority, the next generation S-Class luxury sedan and CL-Class luxury coupe will inherit design cues from the F125 (just don't count on the gull-wing doors reaching production).

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Fuel cell series hybrid drive train
By bildan on 9/12/2011 12:33:30 PM , Rating: 2
That's the real story here.

Using a hydrogen FC as an EV "range extender" instead of the ICE in the Volt makes a lot of sense for a truly practical EV.

FC's need to be cheaper and more efficient and batteries need more energy and power density but those are in the works. Hydrogen supply chain and storage problems are also being solved.

RE: Fuel cell series hybrid drive train
By bah12 on 9/12/2011 1:53:10 PM , Rating: 2
I somewhat disagree.

Although on the surface Hydrogen FC's look good, the fact is most of the hydrogen comes from natural gas CH4 (or other petroleum products). My problem with that is it is only ~80% efficient.

Here is the basic process. You have to use energy to break out that H4 from the C. So you can store the H's for use in the FC to create H2O+energy.

Seems like a lot of wasted effort when you could just burn the CH4 to begin with in a converted ICE. Why waste the energy to create the hydrogen from CH4, just to sound more green?

So IMO the ideal volt ICE would be natural gas powered. Once we have an effective direct H2O to H conversion then sure Hydrogen makes since, but we don't so hydrogen just doesn't make much sense.

RE: Fuel cell series hybrid drive train
By McDragon on 9/12/2011 2:45:41 PM , Rating: 2
Ah, but what is the efficiency of an ICE? 25-30% ?
Electric motors are far more efficient...

RE: Fuel cell series hybrid drive train
By bah12 on 9/12/2011 3:33:09 PM , Rating: 2
The efficiency I was referring to was in the process to create the hydrogen from natural gas. Although at 40-60% efficient, the fact that you've already lost 20% during manufacturing of the fuel I would think it would be a wash at best.

RE: Fuel cell series hybrid drive train
By gamerk2 on 9/12/2011 4:11:30 PM , Rating: 2
Do what we did in the 70's: Hydrogen + Oxygen = Power + Water.
Got us to the moon and back for goodness sakes.

The ICE is a leftover relic of the 19th century at this point, and I view any technology that attempts to keep it as doomed to fail for the reason of "peak oil". [Which we are rapidly approaching]

RE: Fuel cell series hybrid drive train
By Reclaimer77 on 9/12/2011 4:51:47 PM , Rating: 2
You want to put that in an automobile?? Yeah, no thanks.

The ICE is a leftover relic of the 19th century at this point

Pretty bold statement considering there is NO viable alternative even close to competing with it.

And get a clue, "peak oil" is a myth propagated to keep prices high. We've been "rapidly approaching" this peak oil for 50 years now and it still hasn't happened.

RE: Fuel cell series hybrid drive train
By bildan on 9/12/2011 7:32:53 PM , Rating: 2
Actually peak oil has happened. The prediction US oil production would peak in the early 1970's came true exactly as predicted. World oil peak production is predicted for about now.

Peaking world oil production, whether now or 10 years from now, combined with rapidly increasing demand from the developing world will drive oil prices out of sight.

There could be a conspiracy afoot but it's more likely to be OPEC lying about their dwindling oil reserves.

By Reclaimer77 on 9/12/2011 8:55:01 PM , Rating: 2
"Peak oil" predictions, every single one, is based on the Hubbert Curve. Problem is the Hubbert Curve is completely flawed in it's methodology.

I would take any claims of peak oil being a reality with a healthy grain of salt.

RE: Fuel cell series hybrid drive train
By bildan on 9/12/2011 8:05:15 PM , Rating: 2
Pretty good analysis.

Hydrogen is an energy carrier not a source - but if you carry that line of thinking far enough, fossil fuels just carry energy from the sun through millions of years of geology to your gas tank. All fuels are just energy carriers.

There are other ways to make hydrogen than from natural gas - although that's the industrial process in use right now.

New iron based catalysts can produce H2 locally from solar energy and water. Electricity from windmills can split water. Hydrogen in truly massive amounts can be made at nuclear reactors as ionizing radiation splits water.

The nice thing is hydrogen is incredibly energy dense at 143 megajoules/Kg though much less so if measured at 5.6 megajoules/liter.

By shiftypy on 9/13/2011 7:24:34 AM , Rating: 2
the energy density number is even less sexy if you account for means of storage

The back
By ipay on 9/12/2011 10:38:30 AM , Rating: 3
The back need tweaking. It's seams the fat ass of an old lady; and say what you want - that is not appealing.

RE: The back
By Brandon Hill on 9/12/2011 10:41:04 AM , Rating: 2
Are we talking Roseanne Barr old lady or Helen Mirren old lady :)

RE: The back
By amanojaku on 9/12/2011 11:02:06 AM , Rating: 2
the fat ass of an old lady; and say what you want - that is not appealing
Obviously, Roseanne Barr. Fat and unappealing doesn't apply to Madame Mirren. ;-)

RE: The back
By FITCamaro on 9/12/2011 12:32:15 PM , Rating: 3
The whole car is ugly as sh*t.

RE: The back
By NanoTube1 on 9/12/2011 1:55:19 PM , Rating: 3
Yeah, MB can do better. It looks like the car melted.

If it doesn't have . . .
By Rike on 9/13/2011 1:40:25 AM , Rating: 3
. . . a Mr. Fusion and a flux capacitor, how will you ever get to where you really want to go?

Yeah "Leaked"
By toyotabedzrock on 9/14/2011 1:43:08 AM , Rating: 2
All those professional pictures just "Leaked" huh?

I think big business realized everyone likes a leak.

"If they're going to pirate somebody, we want it to be us rather than somebody else." -- Microsoft Business Group President Jeff Raikes

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