Do you mean the village of Muellheim which is in the state of Baden near the French Border? (This is not Bavaria or the Pfalz region that was part of the kingdom of Bavaria for a time in the 1800s)
Another similar spelling is Moelsheim which appears in Alsace, France and also in an another area which is probably in the Pfalz area. I find names of German villages in multiple states using google maps. I almost discarded a major discovery a few months ago because google maps put me in Baden with the village and it needed to be in Bavaria because of late 1800s Census records noted Bavaria over and over again. One morning I typed in the little village and put Bayern behind the name and I found my family I have been searching for for a couple of years.
There is no German village spelled exactly like what you have this on the website. The Saling name is the most difficult I have ever worked on. So far, nothing for sure after years of work.