Vegas Auto Group is fighting back against Floyd Mayweather, a day after he sued the dealership ... with the Sin City-based biz claiming the boxing legend skipped out on a $1.25 million bill for a Maybach!
TMZ Sports broke the story ... 48-year-old Mayweather filed suit against Vegas Auto Group on Thursday in Nevada, claiming the luxury dealership of shady practices surrounding the sale of a rare 2018 Mercedes Maybach G650 Landaulet.