• Apr 8th 2009 at 11:02AM
  • 15
Mercedes-Benz E250 BlueTEC – Click above for high-res image gallery

Mercedes-Benz brought the new E250 BlueTEC concept sedan to the New York Auto Show today, showing the type of clean diesel sedan that could follow in the wake of last year's BlueTEC SUV mini-fleet. The E250 BlueTEC boasts a 2.2-liter four-cylinder diesel engine with SCR (Selective Catalytic Reduction) exhaust technology mated to a seven-speed automatic transmission. The small diesel motor produces big power: 369 lb-ft of torque at 1600-1800 rpm. Part of the conceptual clean diesel fun comes from a 25-liter urea solution (AdBlue) tank that sits in the exhaust stream and reduces NOx emissions, which helps make the car 50-state legal. This is key, since the E250 was created just for us Yankees, MB says. The concept would also meet Europe's strict EU6 emissions standards, which won't be enacted until the later part of 2014. Using BlueTEC in the E250 would probably get the car a 28 mpg city and 39 mpg highway rating from the EPA, Mercedes estimates. Check out the press release after the jump and live, high-res images in our gallery below.

Photos copyright ©2009 Sebastian Blanco / Weblogs, Inc.


Cleanest diesel technology, excellent fuel economy, great fun to drive

  • E250 BlueTEC
  • Unique combination of a highly efficient four-cylinder diesel engine and SCR exhaust technology
  • 50-State Bin 5 compliance
  • Refined power delivery makes concept car great fun to drive
  • Technical data
BlueTEC is the keyword for the future of diesel engine technology. Thanks to the highly- efficient exhaust treatment system developed by Mercedes-Benz, BlueTEC vehicles fulfill the strictest global emissions standards to make them the cleanest diesels in the world. With the E250 BlueTEC concept, which was created specifically for the North American market, Mercedes-Benz is now demonstrating how BlueTEC technology in the E-Class can be combined with a four-cylinder engine with optimized fuel consumption. When fitted to the seven-speed automatic transmission, the E250 BlueTEC boasts fuel economy of 28 mpg city and 39 mpg highway (estimated). The E250 BlueTEC concept fulfills the strictest emissions standards, including Bin 5, and would even meet the considerably toughened limits laid down in European EU6 legislation not due for implementation until September 1, 2014. The EU6 standard specifies maximum nitrogen oxide emissions that are less than half of those permitted by the current EU5 standard. The following is an overview of the current and future limits for diesel vehicles in the EU*:

EU 5 All new vehicles after 09/01/2009 EU 6 / All new vehicles after 09/01/2014

CO (g/km): 0.50 / 0.50
NOx (g/km): 0.18 / 0.08
HC + NOx (g/km): 0.23 / 0.17
Particulate emissions (g/km): 0.005 / 0.005

Group M1 - passenger vehicles with no more than eight seats plus driver. Max. total permissible weight 3,500kg. Test procedure NEDC 2000.

For the E250 BlueTEC, the modern 2.2 liter four-cylinder CDI engine underwent a detailed redevelopment program in order to further reduce the internal raw emissions generated by the engine and to fulfill the legislative requirements for on-board diagnostics (OBD), as well as other factors. The power unit hardware incorporates features from the series production engines, such as four-valve technology, fourth-generation common-rail piezo direct injection, 2-stage turbocharger and exhaust gas recirculation. A highly sensitive electronic engine control system reacts precisely across the full range of operating conditions to optimize the combustion process. The exhaust gas treatment system incorporates an oxidation catalytic converter mounted close to the engine, as well as a diesel particulate filter, which is located at the rear bulkhead in order to shorten its regeneration time.

At the heart of the BlueTEC system are two SCR catalytic converters (Selective Catalytic Reduction) with an "AdBlue®" injector positioned upstream. "AdBlue®" is a synthetic, aqueous urea solution that enables the nitrogen oxide (NOx) to be converted into harmless nitrogen gas in the SCR catalytic converters. The monitoring and diagnosis of the sophisticated exhaust gas treatment process is handled by several sensors, including a differential pressure sensor, a Lambda probe plus NOx and temperature sensors.

For on-board storage of the "AdBlue®" solution, the E250 BlueTEC has a 25 liter tank equipped with a membrane pump, valve, pressure and temperature sensors. The tank volume is sufficient for the duration of a full service interval and is refilled as part of the regular maintenance schedule. The "AdBlue®" tank is integrated into the spare wheel well in the trunk.

E250 BlueTEC combines environmental awareness, driving fun and comfort The combination of the powerful four-cylinder engine with SCR technology makes a convincing argument not only in terms of fuel economy and emissions, but also with impressive performance and the associated fun factor. Thanks to a pair of Lanchester balancing shafts, the concept vehicle's powertrain boasts the exceptionally smooth characteristics expected of a Mercedes-Benz.

Summary technical data for the E250 BlueTEC:

Engine/cylinders - Diesel/I4
Transmission - 7-speed automatic
Displacement - 2143 cm³
Nominal power output - 204 hp
Nominal torque - 369 lb-ft at 1600-1800 r/min
U.S. fuel economy* City Highway - 28 mpg 39 mpg
U.S. emissions compliance - Bin 5
*preliminary figures

In Europe, this BlueTEC technology is available in a series production model starting fall 2009 with the E350 BlueTEC. Under its hood is a V6 diesel engine with 211 hp and 540 Nm of torque. This means that Mercedes-Benz will very soon offer a series production passenger vehicle that complies with the EU6 emissions standard not scheduled for implementation until 2014.

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    • 1 Second Ago
      • 8 Months Ago
      Germans are desperately trying to sell their inefficient diesels in the U.S. Their only goal is to increase their returns on massive investments. That this will increase U.S dependence on foreign oil is not German problem.

      To cover 15.000 miles...

      - Toyota Prius II (0-60 in 10.7 sec) needs 7.4 barrels of oil [1]
      - Toyota Camry Hybrid (0-60 in 8.6 sec) needs 10.1 barrels of oil [2]
      - Nissan Altima Hybrid (0-60 in 7.5 sec) needs 10.1 barrels of oil [3]
      - DIESEL Volkswagen Jetta TDI DSG (0-60 in 9 sec) needs 11.9 barrels of oil (whopping 60% more than the Prius, 18% more than cars one class larger and significantly faster)

      - Lexus GS450h (0-60 in 5.6 sec) needs 14.9 barrels of oil [4]
      - DIESEL Mercedes E320 CDI Bluetec (0-60 in 6.8 sec) needs 15.1 barrels of oil [5] (1.3% more but it's 23% slower)

      - Lexus RX400h AWD (0-60 in 7.5 sec) needs 13.7 barrels of oil [6]
      - DIESEL Mercedes ML320 CDI Bluetec (0-60 in 8.5 sec) needs 19.7 barrels of oil. [7] It's massive 44% more than the Lexus and the Mercedes is still 14% slower.

      To put things in perspective to the diesel Mercedes SUV, the 400HP permanent all wheel drive long wheel base Lexus LS600h L flagship (0-60 in 6 sec) needs 16.3 barrels of oil [8]. The much slower Mercedes diesel SUV needs 20% more.

      Majority of diesels are dirty. This is ADAC (German institution) EcoTEST sorted by exhaust rating for 800+ cars. Diesels occupy virtually all of last 400 places in this rank. The list is topped by Toyota Prius clean hybrid:

      Source: http://adac-ecotest.awardspace.biz/

      So, to sum up, diesels are...
      - inefficient
      - dirty
      - slower
      when compared to hybrids.

      Why Europeans purchase them in such quantities?

      1. Germans (Motor Presse Stuttgart and Axel Springer) bough virtually every motoring magazine and blatantly lie to their readers about hybrid fuel consumption and energy efficiency, providing false, inflated readings. Meanwhile they lie to readers claiming diesels are "clean" and "ecological" although exactly the opposite is the case.

      2. Toyota and Lexus made series of product planning mistakes when promoting hybrids. They sold Prii, GS450h and RX400h fully equipped so sticker prices had to be above bare naked diesels. Europeans started perceiving hybrids as something very expensive, ignoring stuff they came as standard with.


      All sources are EPA fuel economy test results. Each and every car is subjected to the same testing regime to ensure full comparability of results.

      List of links [1] ... to... [8]:
        • 8 Months Ago
        1. Look at EPA energy impact (every car listed on fueleconomy.gov has it), not fuel economy.

        EPA rating are about fuel ECONOMY. Data are in miles per gallon of given fuel to calculate costs easily).

        EPA energy score is about fuel EFFICIENCY. Data are in crude oil consumption as this is the origin of both diesel and gasoline to calculate impact on environment and fossil fuel depletion easily.

        2. Diesels are indeed about 3-10% more efficient than comparable turbocharged gasoline engines with direct injection. But they are less efficient than hybrid systems which both use Atkinson cycle gasoline engine and braking energy recovery.

        3. By saying "dirty" I meant emission of pollutants, not CO2.

        4. Biodiesel is subsidized (why should other pay your fuel bills?) and has dramatically low EROEI (energy return on investments), about 2. Ordinary fuel made from fossils has EROEI of 8 and had about 50 in the past. Growing biodiesel also raises food prices. Calculations show that using all arable land on Earth to grow biodiesel will satisfy less than 10% of demand.
        • 8 Months Ago
        --> StopTheNonsense: Please explain your math when you compare how many barrels of oil different cars need to cover 15,000 miles.

        When I look at the EPA ratings, I see that the VW Jetta TDI gets 29/40 (34,5 combined) mpg with the auto box, putting it ahead of both the Toyota Camry Hybrid (33/34) and the Nissan Altima Hybrid (35/33).

        Same story with the Mercedes E320 diesel, which gets considerably better mpg (23/32) than the Lexus GS 450 Hybrid (22/25).

        Also, the diesel engine is not, as you say, inefficient; the fact is that it's more efficient than the equivalent gasoline engine. It's not "dirty" either, at least not nowadays. The truth is that a diesel car emits less green house gases than an equivalent gasoline powered car.

        Diesel cars also have the benefit of being able to run on biodiesel or synthetic diesel, making them a flexible and great choice if you want to help save the planet. Diesel cars + renewable fuel is a solution, or near future solution, that can be taken advantage of much easier and quicker than anything else out there. And once we start seeing some diesel hybrids, those will be some seriously efficient and high mpg cars.

        And when it comes to diesel cars being slow, I suggest you read up on Audi's successes in Le Mans and the ALMS - their diesel race cars pretty much beat the crap out of all of the competition.
      • 6 Years Ago
      Why not a C-class diesel for N. America? I know it would have to be somewhat expensive for it's size and segment, but it would get even better fuel economy.
        • 8 Months Ago
        C220 Bluetec already please! 40+ MPG and 295 lb-ft of torque = nice...
      • 8 Months Ago
      What color is that E250 at the New York auto show? It's not silver metallic. It could be meteor gray metallic, so some sort of dark-gray metallic with a hint of blue tint. Does anybody know?

      When is the E250 coming to the US? Any possibility that it will come by this fall?
      • 8 Months Ago
      Our Denver Limo service has introduced the Mercedes R350 Bluetec into our Denver limo fleet. 80% of our business is comprised of highway driving and the fuel consumption is far less than that of our previous gasoline fueled vehicles. Our website is currently being configured so that our vehicles carbon emissions can be transferred and made viewable to our potential client base.

      See more at

      • 8 Months Ago

      > wow. StopTheNonsense: you should listen to your own screen name.

      I provided a bucket of references to support my claims. You only came up with a lame joke.

      It's a pill hard to swallow that diesels are ~40% less efficient than hybrids for someone calling himself dslpower, isn't it?
        • 8 Months Ago
        Doesn’t seem a discussion on diesel LDVs can be complete without the diesel-vehicles-are-inherently-dirtier-than-gasoline-vehicles canard being brought up.

        The new generation of diesel LDVs in the U.S. generally has lower emissions of all criteria (regulated) pollutants with the exception of NOx, and even that is only marginally higher for the 50-stated vehicles. Slightly lower NOx emissions of gasoline LDVs do not offset their higher emissions of PM, HC, and CO.
        • 8 Months Ago
        The premium paid for a turbodiesel engine is less than half that of a full-hybrid (e.g. Prius) petrol-electric system.

        Don't ignore the extra upfront cost!
        • 8 Months Ago
        if the 15,000 miles were solely covered in the city, then yes, the hybrid would use up less fuel.

        but if the miles were done on the highway, the diesel would get better mileage than the gasoline hybrid.

        the answer to all of this, even though initially expensive, is diesel - electric hybrids.
      • 6 Years Ago
      I looovveee diesels, and BlueTec has had me very optimistic. I think it is brilliant, if only the manufacturers were brave enough to make a full-court press on the argument for passenger diesels here. Hopefully MB will get the ball rolling; they've stood by diesel, and many of their old Turbodiesels are still on the road, and likely will be long after all of us are dead and cockroaches have inherited the earth.

      with BlueTec, the massive torque, and the good economy, what's not to love America?
      • 6 Years Ago
      The Germans seem to be waaaaaay ahead on clean diesel tech. If their estimation is accurate, those are very good numbers.
      • 8 Months Ago
      How many barrels of oil will it cost to build the eight hybrids that you will need to drive as long as ONE diesel will last?
      • 8 Months Ago
      wow. StopTheNonsense: you should listen to your own screen name.
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