The Bergetiger has is a special unit because the repair system is totally different from vCOH. That's the only unit with you can decide what you want
to repair when you salvage a few vehicles. In the last game i got a damaged engine from a random motar shot and i had to sacrifice
a whole repair kit. It's late game and i got a Bergetiger? - I can do this without losing one repair kit. (Just one special case)
You mean that you only have to use 450 mp, 220 fuel, 6 pop and a doctrine 3 unlock to avoid having to use a repair kit that costs 60 munitions?
HOLY SMOKES, what a bargain!!!!
Also you've clearly never used a Bergtiger before if you think that you can heal a tiger to even remotely "full health".
My advice to you is: use it. You'll be one of the loudest voices in support of significantly boosting it's abilities after a few games.