At the opening of the second day of the Champions Cup, Montpellier lost in Coventry on the lawn of Wasps (33-14).
The Héraultais were quickly reduced to fourteen after the expulsion of the back Immelman for a dangerous tackle (7th).
The English scored five tries, against two for the Montpellier by Lozowski (31st) and Reilhac (45th).
Beaten last week at home by Leinster (14-35), the MHR conceded a second defeat and almost said goodbye to qualifying for the quarter-finals.
Return game against the Wasps on January 16 at GGL Stadium.
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Champions Cup schedule and results