NHTSA Complaint #11572799 — 2019 MERCEDES-BENZ SPRINTER 3500

At high elevations, at some times soon after a cold start the throttle becomes completely unresponsive. This is not a low power issue due to altitude--even putting the throttle pedal to the floor, the RPMs remain at idle and do not move at all. After I power down and restart, it worked briefly and then again became unresponsive. Once the engine is warm, the problem has not appeared. This put me in an unsafe situation on two occasions: 1) Pulling out of a parking lot onto a 2 lane snow covered highway, the throttle became completely unresponsive while I was sitting across both lanes of traffic, leaving me exposed to a collision. I had to shut off and restart the engine to get moving. Elevation 10,700 feet. 2) In a parking lot, moving to get out of the way of a snowplow. I had to restart the vehicle 5 times before I was able to get out of the snowplow's way. Elevation 9,700.