Is it true that the front of the BMW car (between the lights) in the ''calender'' refers to hitler is moustache

No, not at all.

The BMW calendar logo refers to the letters all cleverly moulded.

Hope l helped

No, whoever told you that does not know what they're talking about.

bmw made aircraft engines before and during the war. they did not make cars until after the war, after hitler was dead and permanently discredited. there is simply no way that this car pays homage to nazis.
whoever told you this just secretly wishes they drove a bmw. they don't, so they be hatin', yo.