I'm a frustrated Mercedes Diesel fan hoping the E Class 4Matic wagon will eventually be brought to these shores by stubborn MB of North America.
Anyway, if given the opportunity I would go for the Bluetec. I just had had the opportunity to test drive a new GL 350 Bluetec at the dealer. I cannot describe my amazement at how nicely that vehicle drives - there's a lot of power (torque) on tap for any traffic situation that it is almost hard to believe this is a 3.0 liter Diesel on a 5500 lbs. AWD vehicle! That's 1500 lbs more than an E Class wagon.
I hope that gives you some idea of how an E Class Bluetec should drive.
I live in very hilly farm and rural area. The county plow trucks just can not keep up.
The open farm fields adjacent to all the roads allow for a prolific amount of drifting
across the entire road. Even days after a snow fall. So I love the AWD system. I am
willing to give up a tad of HP and MPG for the winter safety and that is even on Nokian
That is not to say I could not get by on RWD only. Just that I would have chains on from
the end of November to March/April. The roads are that unpredictable here.
Currently the only available wagon is 4Matic and if/when the diesel version comes (don't hold your breath) I'd bet it will be 4Matic, too.
Each and every drivetrain combination requires the very expensive EPA certification process, and since Mercedes feels the heavier wagons require a different rear axle ratio, that makes it a separate drivetrain. 4WD vs 2WD are separate drivetrains, too. MBUSA simply is not going to certify three new drivetrains for potential wagon owners.
Given that BMW has stopped exporting 5-series wagons to USA and Volvo no longer sells wagons here either (can you imagine?) again I wouldn't hold my breath. In fact I think it's a near miracle the W212/E350 gasoline wagon for 2011 is available here. I know for sure my dealer has not had a new wagon as an unsold stock vehicle in years.
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