We were in a low speed situation. A car 2 cars in front of us was signaling a right hand turn. We began to slow down from approximately 25 mph to 5-7 mph. The car turning right stop short of completing their turn, the car immediately in front of us came to a complete stop. We were only traveling 5 - 7 mph behind and had plenty of room to stop. I depressed the brake further (we were already slowing due to turning vehicle) but the truck did not slow at which point I depressed the brake pedal as hard as I could. The truck did not slow at all in this time (no brake locking, no skid marks). We only came to a stop when we hit the stopped vehicle in front of us. Additionally, this vehicle has advanced safety features (forward collision warning and active braking assist) -- none of these features triggered. I have lost all faith in this vehicles ability given the situation. I contacted Ford customer service, they referred me to their Office of General Counsel and said to expect a response in 45 - 60 days. That is unacceptable to me -- I have a very expensive vehicle that I cannot drive as I do not trust it. I want to understand why all these systems failed, have them as well as my vehicle fixed or the vehicle bought back from me. I cannot wait 60 days for resolution.