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Mercedes-Benz models, news & reviews
By Andrew Noakes
16 June 2008 17:16
Advanced engineering wrapped in ‘aquatic’ styling made the Mercedes F700 concept car one of the stars of the Frankfurt motor show in September 2007, and CAR has been itching to put its technologies to the test ever since.
Flip-over, cork-faced seats and a navigation system run by a virtual assistant called Gloria are novel enough, but we’re really here to find out about the revolutionary DiesOtto engine and Pre-Scan suspension.
Mercedes calls it DiesOtto because it combines elements of diesel and petrol (Otto cycle) engines. Centrepiece of the DiesOtto concept is a new combustion system called Homogeneous Charge Compression Ignition (HCCI), which several manufacturers are now developing. It uses carefully controlled in-cylinder temperature and pressure conditions to ignite the air/fuel mixture without a spark.
The result is very clean, efficient combustion, but the drawback is that HCCI struggles to work over a wide range of engine speed and load. So for cold starts and full-throttle acceleration, DiesOtto switches back to spark-ignition mode.
With twin sequential turbochargers and a capacity of just 1.8 litres, the F700 DiesOtto generates 238hp. An electric motor adds another 20hp and boosts total torque to 295lb ft. As a result, the S-class-sized F700 has S350 performance.
Thanks to the efficiency of the engine, plus an urban start/stop function and regenerative braking, it returns up to 53mpg. Highly impressive for a big limo like this.
Click ‘Next’ to read the rest of CAR’s review of the new Mercedes F700 concept car
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Mercedes F700 concept (2008) CAR review
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RE: Mercedes F700 concept CAR review
I remember reading about a Bose Corp. suspension system that sounded awfully close to Mercedes Pre Scan. When I spoke to a Bose PR person, she said the system would be an option on new luxury models (of any manufacturer) only; it would never be an aftermarket add-on. So I'm guessing that Mercedes' version is a rip-off or Bose is using M-B to introduce its latest version. A few years ago, an online video existed showing a Camry virtually "leaping" over a 2x4 with virtually NO impact to the forward movement of the vehicle. Very tantalizing indeed. The 'environment detection' system seems a bit far-fetched to me.
25 June 2008 23:22
F700 - Don't you listen to all those misguided people. You're beautiful.
24 June 2008 09:18
Technologies aside, what an ugly piece is this? When that face appears on a Ssangyong named Rodious, it's the ugliest car in the world. When the same face appears on a Merc, it is the star of the Frankfurt show. Go figure...
20 June 2008 22:45
Mercedes is obviously feverish and gripped by delirium. How else can this thing be explained, in an age when production hybrids have been on the road a decade and even a production fuel cell car exists?
20 June 2008 13:45
That thing looks like Elton John, or something with a big smile and stupid glasses.
20 June 2008 00:26
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