Arrived in reasonable time, based on fact it was coming up from U.S. With the change in weather I won't be changing the filter this year, but will be installing next Spring as weather warms up next year. Product appears to be well made and the packaging suggests it is OEM item, so good deal vs purchasing the part from Mercedes or worse still, having this changed in their shop !!
And if in doubt about how to do the change, you can always find instructional videos on line.