But its legal to to drive without being able to see out rear window if u have two working side mirrors.
True, it might be allowed IF you have two, unobstructed rear view mirrors.
But, there is no way an officer could conclude that from 100, 200, or more than 30 feet away.
He was able to conclude your rear window was obstructed.
So, his REASON to stop you is unknown to you at present.
When he does make it known, under oath at your trial, I suspect he'll say he was investigating if you did have two, unobstructed rear view, working mirrors.
Whatever he says, it'll be spot on and will support his decision to stop you.
That said, if you knew you had been drinking enough to blow more than .08, where in the law does it make it LEGAL for you drive (even to move your car a 25 feet to avoid a parking citation) in an intoxicated condition?
No need ti answer, I know the answer.
Your issue isn't the stop, its how can you defend your alcohol blood level above .08?
Plead not guilty, hire a lawyer, or ask the court to appoint a public defender, and spek to no one but your attorney.
Good luck.