In certain conditions, the connection between the between fuse and fuse mount for the blower motor could overheat.
A fuse and wiring that overheats could create the risk of a fire.
Mercedes-Benz will notify owners by mail and instruct you to take your vehicle to a dealership to replace and relocate the blower motor fuse and its wiring. To reduce the safety risk, Mercedes-Benz recommends that you should only operate the blower in manual mode, and not use either the highest or lowest temperature settings until the recall repairs have been completed.