bald bloke:
Eco roll is to blame for some of this.
Very much this ^^^ if I’m using the ppc function on the Actros I drive I watch my mirrors like a hawk as the computer will cut the power and let you lose 4 mph because it knows there’s a downhill section coming that your inertia will carry you over.
I watch the mirrors because if there’s a lorry close behind me I can easily intervene with the throttle pedal and maintain the same speed I was doing when said lorry caught me.
I also only let it go downhill when I haven’t got another lorry overtaking me, if there is one I’ll use the exhaust brake to keep it bang on the 86kph that I set the cruise at. Simple really, and saves animosity between drivers.