The ground connection bolts in the passenger-side footwell for the electric heater may be improperly tightened.
Loose ground connection bolts on the electric heater may cause the wiring to overheat, increasing the risk of a fire.
What to do
Dealers will check the electric heater ground connection and repair it -- as necessary -- free of charge.
Owner notification letters are expected to be mailed on January 18, 2022.
Owners may contact MBUSA customer service at (800) 367-6372.