There is a German made after-market filter (Corteco-Micronair) that is equal to the quality of the MB boxed filter at about 1/2 the cost. In fact Corteco-Micronair almost certainly makes the filter that comes in the MB box.
Just changed both filters engine and cabin on my 2015 freightliner sprinter... both ran for about $42+ at autozone stp brand. Just bought this van... it had the original engine air filter in it... and a pile of leaves at the bottom...sigh🤦♂️ oh well it's all clean now.🤗