Wydad are one of the giants of North African football and qualified for Fifa's new competition as a recent winner of the CAF Champions League.
However, they had a disappointing season in Morocco, finishing third in their domestic league.
That performance led to them parting company with South Africa-born coach Rulani Mokwena, with Benhachem replacing him on the bench.
Wydad will also face Italian giants Juventus and Al Ain of the United Arab Emirates in Group G, with the top two advancing to the last 16.
--ChannelAfrica--