Originally Posted by
flatlander
If you are renting the car for several days before you need to enter an Umweltzone, you could try for an
Umweltplakette from the city of Berlin, who have returned mine within a few days whenever I have applied for one. Cost about €6.
TUV-Nord sell them online as well. I expect they could be persauded to send it to a hotel or similar.
You do need to supply some proof of the car meeting emissions regulations; since I was applying for a German-manufactured car in both cases, I simply sent them the German specifications sheet that came with the car

thanks!
for sure I would do that next time when I have more time. But this time I got the info about those requirements 2 days before I arrived in Munich (and I believe many foreigners driving their do not know at all and have to pay the fines if they are caught!)
I think scan of registration certificate of the car is sufficient to apply online