Your wagon uses the same front struts as the sedans. I recommend Bilstein HD's over comfort. The rear's are MB only. Finding Bilstein SLS struts are difficult to find, and very expensive. They usually don't wear out though in the rear. The fronts do around every ~90k.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k