A11.31 clearly states that the CC is sequential.This seems odd, but I think the ambush mods mighgt still apply. This is not a concrete answer but in A11.31 an abandoned vehicle still causes the CC to be sequential. So I don't see any reason that it would not still also cause the ambush mods to apply. shrug
Seth
If the location contains enemy personnel, then ambush does apply. However, the balance of 21.2 states that the presence of enemy personnel in the location counts as as escort for both sides. This implies that the ambush drm does not apply to either or it applies to both sides.If there are no enemy Personnel in the Location with an Abandoned enemy AFV, it may be captured automaticallyby any Infantry unit in the same location at the end of a CCPh but Ambush is NA.