NHTSA Complaint #11505866 — 2020 FREIGHTLINER CASCADIA

Multiple safety issues with truck #1 When driving & using cruise control (CC) at 60 mph & truck is at that speed (60 mph) truck is moving from top speed to E coast mode. Immediately RPM is down (from 1250 to 600) & steering wheel is much harder b/c reduced power from engine . Response time for driver to avoid potential hazardous situations on the road (i.e. animals, rocks, trees, etc.) is longer & not safe #2 This problem is related to when truck is in regen. In driving, and when truck is doing regen (visible on the dash: high temp light/ icon). CC set to (60 mph) when truck is at that speed (60 mph) truck goes to E coast mode. RPM is going down to 600 RPM which is not adequate engine speed to finish regen. With regen interrupted there is a lot of white smoke under the truck and red light for engine shut down is on the dash. There is 30 seconds time to override shut down but at the same time the driver needs to safely park the truck on the shoulder, on a busy highway, with reduced power and steering wheel (600 RPM or no power at all because engine shut down). With high DPF temperature,there is potential for fire (truck,grass,trees ). I am told engine shut down was caused by interrupted regen process. #3 Collision warning is coming with no reason, and can activate active brake, at high speed. Radar malfunction (snow, ice in the front)can cause malfunction to adaptive cruise control, active brake assist, & malfunction other safety features. Combination of malfunction (radar, active break assist, collision warning, IPM [intelligent powertrain management], engine break not engaging) can cause dangerous acceleration for heavy loaded truck. I contacted DTNA (Daimler Truck North America) in regard to these issues & am told in order to solve these issues the truck should be inspected where mechanics and programmers are involved. At the same time I spoke with the company I work for about safety issues with those trucks. You can contact me for further information.