This would already be a nice beginning!
Nevertheless, you must make not all vehicles all at once, the time leaves you you need!
Although it would be the favourite to me, you would have made in two, three days 3,4. 5 vehicles. . . ha, ha ha, fun!
Have an nice Time!

@user, we'll have a 2010 BMW 5 Series for police, but I'm not sure how much time i can spend on other vehicles at this moment

Thanks for your quick answer! :-)
I meant not this Prop stack, but a new series by German cars.
I am glad very much that you want to make German cars! Since for police, fire brigade, or emergency service there are too little German versions.
I already know Deien Fiat 500, however, Fiat will never become a German police car. . . ! :-)
VW and BMW are used mostly as police cars, there is also Porsche, for the speedsters. . .
Thanks again, pleases me about new German police cars!

@user...you can see the vehicle in the Fiat 500e screenshot here: https://steamuserimages-a.akamaihd.net/ugc/874122289166846763/2D6133372968AD964696845CDBE3793E9D5FC4B4/

I don't know of any German police that uses these cars. I'll make German versions if I make German Cars. The VW Golf will get a Polizei Version, but there are no other vehicles planned.

Can you make a German Version ?- VW, BMW, Mercedes, Porsche...