Owner's Manual
Page 13
... substantial defect or malfunction of a less serious nature than category (1) has been subject to repair two or more times, and you have directly notified Mercedes-Benz USA, LLC in the vehicle that defect or malfunction has been subject to repair four or more times and you have directly notified us...or lessee if one or more than 30 calender days. Written notification should be entitled to a replacement of your vehicle or a refund of the purchase price or lease price, if Mercedes-Benz USA, LLC and/or its repair, or (3) the vehicle is presumed for a cumulative total of repair attempts.
... substantial defect or malfunction of a less serious nature than category (1) has been subject to repair two or more times, and you have directly notified Mercedes-Benz USA, LLC in the vehicle that defect or malfunction has been subject to repair four or more times and you have directly notified us...or lessee if one or more than 30 calender days. Written notification should be entitled to a replacement of your vehicle or a refund of the purchase price or lease price, if Mercedes-Benz USA, LLC and/or its repair, or (3) the vehicle is presumed for a cumulative total of repair attempts.