April 18, 1934 – May 24, 2023 – Michael "Mike" Muller, 89. Beloved husband of the late Trudy, nee Arst; devoted father of Mark (Lori) and the late Scott and Glenn Muller; treasured grandfather of Priscilla, Madison, Jared, Mackenzie, and Aleksandra; loving brother of Ann Hilton (aka Arlene Muller); caring uncle of Kip (Kathy) Weissman and Kathy (Jack) Giroux. Mike was a proud veteran, serving in the US Army during the Korean War. He was the owner of six distinctive automobile dealerships in Illinois and Northern Indiana. He started as a car salesman in 1968, eventually becoming partners with Irwin Grossinger and opening his own dealership in Highland Park in 1974. He will be deeply missed by extended family, friends, and colleagues. Memorial contributions may be made to the Wounded Warrior Project, www.woundedwarriorproject.org.