| | Since 1990, the European Union (EU) has been requiring increasingly drastic reductions in emissions. The latest stage in this process was the replacement of the Euro 3 standards by Euro 4. Further significant reductions will take place in 2009, when Euro 5 goes into effect. |
| Since internal engine modifications alone were unable to offer compliance with the new emissions standards, Mercedes-Benz decided very early on to adopt future-proof technology: exhaust aftertreatment with BlueTec®, based on SCR (Selective Catalytic Reduction) diesel technology. BlueTec® is a solution capable of achieving cost-effective and dependable compliance with both Euro 4 and Euro 5, which is scheduled to take effect in 2009. |
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