The covering for the center console can bubble and discolor. Replacement of the affected part is most commonly only way to repair this concern.
Car Problem Reports
Mercedes-Benz ML320 Covering For Center Console May Bubble/Discolor
Mercedes-Benz ML320 Problem
Average Mileage: 139,251 mi (95,000 mi - 176,000 mi)
Visitor, 2001 Mercedes-Benz ML320, 95,000 mi
Same problem, bubbling. I have not fixed this yet..
Console cover is bubbled and discolored
Bubble in cover top