Car navigation restoration

The car navigation that I sended to the repair center of the manufacturer for repair came back.
When I installed it to my car, It seems that it has completely repaired and the software has also been updated, so even if the volume button breaks down and keep it pressed, it will not rise above volume 15 .
(If I want to raise to more than15, the volume increases by 1 each time I press the volume button.)
I got a telephone with a detailed explanation from the repair center on the way, and I did not need to pay the repair cost.
I am very satisfied.