The cruise control (level 2 autonomous) will turn itself off without any warning sometimes. This happens any time the truck is set for above the speed limit by more than 2 mph. The truck uses a speed limit map, independent of actual posted speed limits. When the truck detects a speed limit drop to below the cruise setting, either real or imagined, the cruise control disengages without any warning or notification. This is a problem when I expect the truck to continue its autonomous function in traffic situations, but it does not, and without warning. The system will even disengage while it is operating; it will be slowing or maintaining a following distance, then disengage. The driver has no idea if the truck is still auto-driving until he is close to a rear-end accident. Also, bear in mind that speed limit signs are often only posted on the right side of the road; If there is something blocking the sign, like another vehicle, the cruise will still disengage without warning, and the driver does not know it. The only way to tell if cruise is still engaged is by looking for a small green icon in the bottom left of the dash display, which is over 20 degrees down from focal view. Also, there are times when the cruise disengages for no apparent reason. Sometimes there is a barely audible bluetooth-disconnect type sound, but often there is no audible warning. There is also no display warning of any type.

Source: NHTSA complaint ODI #11633126 · view all complaints for this vehicle at nhtsa.gov

On [XXX] I was traveling across Wyoming west from Laramie Wy to Cokeville Wy. It had been snowing all day with temperatures fluctuating between 28 and 31 degrees. I had my headlights on all day when the sun went down I was on [XXX] and I couldn't see anything. I had to pull over on the side of the snow covered road to find my headlights totally covered with about a half inch of snow and ice. I asked my dealer to check the LED headlight heaters and was told Freightliner didn't build a heater for their LED headlights. LED headlights do not create heat on their own and there for will not melt snow and ice off like traditional halogen lights will. I travel from Oregon to Colorado every week and this is a serious safety defect it is dangerous to pull over to clear snow and ice on the side of the road just so Freightliner could save a few dollars on headlight heaters that all LED headlight manufacturers are already included on other vehicles INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Source: NHTSA complaint ODI #11624895 · view all complaints for this vehicle at nhtsa.gov

It is hard to impossible to drive the truck in a straight line (compared to models without the smartvalves), and often drifts side to side randomly without any warning or feedback. The steering requires constant input, and the "feel" of the truck is not correct to allow intuitive steering. When driving in tight areas, I find that I need to stay at least a foot away from barriers or other objects to not be in danger of hitting them. When in width-limited areas, like construction zones, I often need to straddle the center line and block other vehicles from passing me, so as not to be in danger of collision. These controllability problems are induced by the "active" smartvalve system. This is the chassis leveling system that adjusts air to the suspension air springs (air bags). The smart valve system is there to allow a driver to adjust the suspension up or down as needed to assist in hooking in improperly positioned trailer (to prevent injuries). The system also actively interferes with what would be the normal operation of a suspension "leveling" valve, and adjusts and or blocks the normal flow of air in and out of the suspension when driving. This results in poor handling and control problems. I have asked to have the valve replaced with a normal "dumb" valve on my truck, since I have found that the trucks handle normally with a standard leveling valve. I have also found that in many curvy road situations, the truck is hard to keep from running off the road, even bobtail. There is severe apparent understeer, and it seems likely to be attributed to the smartvalve leveler interfering with the suspension. I see that there is a recall on Freightliners having to do with understeer problems on curves (Recall 234245 [USA]: Understeering during a j-turn may increase the risk of a crash.). The recall says that Freightliner will replace the tires; it is likely that this will not help in the case of models with an active "smartvalve" system.

Source: NHTSA complaint ODI #11633144 · view all complaints for this vehicle at nhtsa.gov