Besides seeing the 2009 SL for the first time today, our training included a lot of information about the 2009 ML320, GL320 and R320. For 2009 the CDI diesels that currently power these SUVs will be upgraded with BlueTEC emission systems similar to those in the current E320 BlueTEC. These vehicles will also be the first to use AdBlue to decrease emissions to levels that will allow them to be sold in all 50 states. (AdBlue isn’t expected on the E-class until its redesign is released around August of 2009.)

AdBlue is a fluid that when combined with the exhaust gases results in a dramatic decrease in emissions. While diesel engines are already more efficient than gas engines, getting about 30% better fuel economy, their sales have been limited by emission standards in many states. Georgia is not one of these states but as the number of states that restrict diesels has grown it was important to find a solution. Check out the video below to learn more about how the injection of AdBlue into the exhaust reduces emissions.


The addition of the AdBlue system will result in a few changes to these vehicles. The biggest change will be the tank to store the AdBlue fluid. To elminate interior modifications this tank will occupy the space currently used for the spare tire. As a result, all 2009 BlueTEC SUVs will be equipped with run-flat tires. The non-diesel SUVs will continue to have spare tires.

The tank for the AdBlue will be between 7 and 9 gallons. The tank will be topped off at the regular 10,000 mile service intervals and completely flushed and refilled about every third time. You will get a service indicator alert if your AdBlue tank reaches 25% capacity. Then, if your tank runs empty, you will have 20 starts to either visit the dealership or top off the AdBlue tank yourself. The AdBlue fluid is supposed to be available in 1 liter bottles at many retailers by the time that you’re ready to refill.

I would be happy to talk diesels if you have any questions or would like to pre-order. We expect these vehicles to be released for sale on October 1st, 2008. As with all pre-release information this is subject to change, and change without notice.

March 20, 2008 at 6:11 pm by Jesse Cannon-Wallace
Category: Diesel, GL-Class, ML-Class, R-Class