140 M1A1 SA tanks for Iraq At Last

[Haavarla]

That was included with the TUSK upgrade program I think so if these tanks have been through that or were manufactured to that standard, they'll have the APU.

I read through your link.
Thx, it was interesting.
But i could not find anything about APU, if and when they installed it..?

If this happend like 5-6 years ago.. strange.

KMW just recent started the upgrade with 2A7 variant which has this feature:

Other significant changes include the installation of an auxiliary power unit to enable all subsystems to be run with the main engine switched off and an air-conditioning system, new drivers hatch, and all-electric gun-control equipment.

Germany receives first Leopard 2A7 MBT - IHS Jane's 360

Some older Leopard variant had a small APU, but not like this one, which can supply power to all main systems while main engine is off-line.

I'd say this is a game changer, in order to increase range between each refueling.
Every time you make a short or long stop, the Main engine stop and APU take over, and hense reduce fuel consumption.