bad news are ok!
I was happy to see today that there was no nest in the ventilation system. In fact , I assume that because I could smell it in the car. BUT! there were no nest since the odor was from the trunk. Since the trunk carpet was removed, I simply wash the trunk and problem was solve! I assume that mice could have been trapped for a while by the spare tire lower section.
I removed the back seat to see what kind of space i could have bought putting battery below it. It look just fine for a series of 12V battery so I will have to consider battery height. However, I rather not have people sit directly above batteries for vapor that can emanate from the batteries. more over, these batteries would be more vulnerable to anything below the car.
I need the check this again but here a picture of the back seat removed. I found actually 1.35$ in spare change below the back seat… and poker chip but anyway!

