German car number plates are abbreviations of the cities or regions the car is registered in. The larger cities have one letter – so M stands for Munich. And this car even has a name!
In wine growing regions the name of the vinyard is often written in large letters on walls. This M is part of the name Domberg in the Nahe region.
The M in the Ironman logo is very prominent.
I can’t help seeing an M in this crown or these dancing people.
More Ms or possibly Ns can e found here, linked to Cee’s Black & White Photo Challenge: letters M or N.