It's too technical or not technical enough for me to comprehend. We can all understand and applaud when you see the process in chemical equeations. Is it prepriotary that cannot be disclosed or just another atempt to build a "perception". Both?

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I wonder where Merc gets the UREA from?

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this does not explain anything!

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I wondered what urea is, here is the wikipedia explanation.
http://en.wikipedia.org/wiki/Urea

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So what happens when you run out of AdBlue??

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I wonder if these new emissions-cutting technologies will be fully compatible with biodiesel. I haven't heard any mention of that. Imagine a Merc running biodiesel with one of these kits! Now if only they would start doing emissions testing of diesels so we'd know how bad/good we have it (supposedly, in 2010...).

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#6 Jason, the Mercedes-Benx BlueTec FAQ explicitly mentions biodiesel use. Unfortunately the FAQ is inside a flash applet. Although MB only warranties B5 (like almost everybody else at the moment), BlueTec is biodiesel friendly.

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SAAB is another car company that markets diesel cars in Europe and is definitely one of the worlds' leading car makers in vehicle safety, as is Volvo. It is notable that both companies are located in relatively tiny Sweden, a country that cares deeply for the welfare and safety of people. SAAB and Volvo have a history of bringing out safety innovations not because they have to, but rather because they WANT to! Both companies go to accident scenes involving their cars to study how they can make their cars safer...how admirable!

Alternative fuels for an automobile are certainly becoming increasingly important as time goes on. Eventually, we are bound to run out of fossil fuel on this planet, as there is a finite amount to pump from underground. Additionally, the rate at which we use it up will be increasing, especially since China is just beginning its rapid expansion in the use of cars. Also, the way things have been going in recent years, the carbon dioxide released from burning fossil fuel, fuel that has been buried for millions of years underground, is causing “the greenhouse effect” to be of major concern because of the global warming it causes. Clearly, the polar ice caps are melting at an increasingly alarming rate, and not as much of the water is re-freezing in the “winter months” (depending on the pole). If we don’t do something about it soon, like within about 20 years, we will find our cities on the coasts buried under water. Also, as I understand it, the warming of the oceans will cause quite dramatic shifts in weather patterns, meaning more hurricanes and stormy weather. I’m not writing this for the purpose of extolling gloom and doom, but rather to point out that we human beings in the near future need to be altering our ways of burning such large amounts of fossil fuel. We need to ramp-up the development of new technology and methods to power our cars and to be less reliant on cars in general. Of course public transportation helps, but we need to develop the technology and efficiency of using alternative sources of energy soon. In my opinion, ethanol is an important component of the bridge needed to get us to the use of hydrogen cells, and beyond, to power our vehicles. The beauty of burning ethanol, being that it comes from the fermentation of vegetative sources such as corn, wood pulp, and many other plant sources, in effect recycles the carbon dioxide present in our atmosphere. Plants use it to grow in the process of photosynthesis. Brazil uses almost exclusively ethanol that is derived from sugarcane grown there.

Here in the U.S. and elsewhere, the auto makers are producing more and more cars that will run on “E85” fuel, composed of 85% ethanol and 15% gasoline. Gasohol (10% ethanol) has been a good start, but E85 is even better in my opinion. Vehicles that will run on either gasoline or E85 are called “flex-fuel vehicles” (FFVs). In the latest issue of the leading consumer magazine is a front-page article about what they deem, “the ethanol myth”. They came to the conclusion that it is disadvantageous to run a FFV vehicle on E85 fuel instead of gasoline. Both the fuel economy and acceleration of the 2007 SUV tested dropped when running on E85 compared with gasoline.

From this, it seems apparent to me that the U.S. needs to catch up to Sweden, General Motor's Saab in particular. Running on E85, the Saab 9-5 "BioPower" Turbo model delivers a significant 20 percent increase in maximum power and 16 percent more torque while emitting 80% less CO2 into the environment compared to running it on gasoline. Running E85 compared to gasoline takes about a second off the 0-60 mph time, and there is a 15 percent gain in fuel economy on the open road where fuel-enrichment for engine cooling is no longer necessary when a vehicle is run on ethanol. The 9-5 BioPower has taken the Swedish market by storm this year, outselling its full-year 2006 sales target in just four months. Sweden has a long cultural and political tradition of respect for the environment, and this is reflected in Saab's achievements of the pioneering of asbestos-free brake linings and the removal of CFCs from air conditioning systems, and now Saab’s Trionic 7 BioPower engines. I remember back in 1973, when the oil embargo hit and additional "smog control" devices (i.e., the EGR valve and air pump) were required on new cars, their performance declined significantly. Many people at the time, including mechanics and engineers, thought the performance and efficiency of cars had been dealt a lethal blow. This is when I bought my first Saab, a 99 EMS. Saab, with the development of the "lambda sond" oxygen sensor (keeps the correct stoichiometric ratio of 14.5 to 1 in the air-fuel mixture) in 1976 along with electronic fuel injection, required no such smog control devices. It was the beginning of electronics-to-the-rescue for car performance. This technology, along with concern for safety and functionality, enamored me with the cars. I was impressed that they did this because they wanted to, as opposed to doing it because they had to. Seemingly at odds with one another, performance and fuel economy were blended together in a practical and distinctive car.

So here we are, forty years later, and Saab is still leading the way in emissions and performance technology. All Saabs are turbocharged and have direct ignition, and the engine’s combustion process is very precisely controlled by a powerful 32-bit microprocessor controlled system called, "Trionic 7". This unit monitors the combustion process in each cylinder a million times per second for optimum efficiency. It precisely regulates the fuel-air mixture in each cylinder, the ignition timing, and the amount of turbo boost pressure allowed. And(!), very significantly, it automatically adjusts itself to any proportion of gasoline and ethanol.

How does Saab achieve higher performance using E85 compared to gasoline, you might ask? It stems from the octane rating of E85 being about 10% higher than that of gasoline. The Trionic system thus allows more advanced ignition timing, a higher compression ratio, and a higher turbo boost pressure, all of which increase the performance and efficiency of the engine.

There are two driving forces behind the adoption of a renewable and sustainable fuel such as “bioethanol” E85: The environmental need to combat climate change from the greenhouse effect and the strategic need to overcome dependency on oil, a finite resource for which global demand will exceed supply, not to mention the world tensions related to it’s procurement. Sweden plans on being free of dependency on oil by the year 2020. Let's hope that the same will be true of the U.S. It appears to me that General Motors, especially with Saab’s traditional engine know-how, is leading the way.

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