Verify using your vehicle's VIN. Does the vendor not supply the VIN, or are there no local websites that offer the VIN along with the registration plate?
It is quite evident, indeed. Otherwise, there would be numerous shunts daily, as the majority of relatively new vehicles are equipped with Adaptive Cruise Control (ACC).
Presumably, you are referring to the scenario in which the Adaptive Cruise Control (ACC) detects a deceleration ahead and engages the brakes; otherwise, a rear-end collision with trailing vehicles would occur.
Did you acquire the vehicle with diminished power, or did you have the DPF and EGR systems reprogrammed, resulting in satisfactory performance thereafter?
Variations in tire tread depths exceeding a few millimeters between the front and rear tyres, as well as between tyres on the same axle, may lead to comparable troubles, since the transfer box is adversely affected by such discrepancies.
Such is the consequence of cutting-edge technology: chain malfunctions, injector failures, and engine components of inferior durability in diesel engines.