[Marcello]

"Immobilized Tank in Mud, in the house, etc.
To make rescue of the got stuck machines.
For example other tank or Engineer vechile could make it.
it only idea."

This can be done by inputting a 2XX value in the carry capacity parameter of said vehicle. I have already done it and it does work: you can load tanks stuck in collapsed building etc. and carry them away. The problem is that it works too fast compared to most real world situations.