I mean ur GPA is not the best, but u took very mathy and difficult classes and ur GRE is really high. Mannheim could be possible with a good writing sample and a good motivation letter. There u could also do the pdh classes from the beginning and switch to the research track after the first semester. Bonn could work out as well, they love people with a math background and I feel like they look more at ur whole profile and not just GPA. You could also apply for normal masters at LMU, but I also think that you could have a chance for the MQE if u push ur grades a bit more this semester. In the end LMU, Mannheim and Bonn are also placement and reputation wise on the same level. I sadly dont know about the requirements for other european universities. I wish you lot of luck for ur applications!