The facelifted W124 will always have a cabin filter, you can very easily pry up the batwing glass moulding and remove the wiper trays to see the filter tabs from the driver side.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)