Ok, so the bonnet release issue of cable vs latch bonnet opening.
The change to the bonnet release was conducted at the Army's behest in 1992. Originally they were built with internal release cables, but there were a couple of faults.
1. they often broke & 2. in the event of an electrical short, they often became the 'earth' with a resulting melting of the outer case and an immediate cessation of bonnet release ability.
Whilst on the subject of this, I am told it would be wise for owners to check and clean all earth points and check conductivity, as after the removal of the bonnet release cable, the heater control cables became the favored path of the 'wriggly AMPs' as an earth with a similar cessation of function.
Recommendation would be to stick with the external release on that basis.
I have also attached a Service Bulletin which details the changeover parts etc.
