I always go for
climate controlled storage for my car. But there are certain things I always follow before I put her away for like 4-6 months. The things I care about are:
The first thing would be choose a safe location. And always choose the one with the best security options, for eg, CCTV cameras, perimeter fence etc.
Next, check the engine oil and mileage limit. If you have reached the mileage limit, then may be you should change it before storing.
Wash and keep you car clean before putting her away.
Evacuate the water from the crevices and add fuel stabilizers also check if the the anti-freezers are topped up.
Inflate the tires before storing and disengaging the parking brakes would be better.
And I take my battery out. And connect it to the maintainer. But there are who don’t like to take their batteries out. It’s according to you, what you are going to do about your’s.
And about covering I use a tight fitting cover.
I hope this helped you make up your mind about what you should do with your Z4M Coupe.