Owner's Manual
Page 13
... substantial defect or malfunction results in a condition that defect or malfunction has been subject to repair two or more times, and you have directly notified Mercedes-Benz USA, LLC in writing of the need for its repair, or (3) the vehicle is driven, that is likely to cause death or serious bodily injury... fail to fix 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 express warranty after a reasonable number of repair attempts.
... substantial defect or malfunction results in a condition that defect or malfunction has been subject to repair two or more times, and you have directly notified Mercedes-Benz USA, LLC in writing of the need for its repair, or (3) the vehicle is driven, that is likely to cause death or serious bodily injury... fail to fix 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 express warranty after a reasonable number of repair attempts.