NHTSA Complaint #11449057 — 2021 MERCEDES-BENZ S 580

Background: This is a V-8, gas vehicle.The 12-volt battery gives CRITICAL CHARGE notifications constantly. Incident: Dry pavement, 400-mile, January winter night, highway driving in Wisconsin Northwoods at posted 70 mph; some with cruise control, some without cruise control. Seat belt was in use. On four occasions, car independently, without any warning, dropped from 70 mph to 35 mph, projecting me forward. No reduction in speed signage No small town drive through. With car and semi-truck traffic behind me, luckily no rear end collisions, injury or death occurred. During dealership repair service 12/09/2021 - 12/17/2021, along with mailed pending recall from manufacturer for ENGINE CONTROL SOFTWARE UPDATE, was told December 28, 2021 it would occur. When car returned for service on 01/18/2022 (and is still in for service today - 01/26/2022), I was told 01/14/2022 was the update release. I have not received any updated manufacturer notifications. Dealership (Illinois) says CONTROL MODULE on order from West Coast. (Photo - Portion of text response from Dealership Service Writer on 01/26/2022 is attached.) Dangerous vehicle. This newly designed model has engineering problems. Should not have been released to sales market. Numerous ELECTRICAL Problems have occurred since my August 5, 2021 purchase.