Thanks Aries!

Download building, download vehicle...use a other mod too called Advanced Vehicle options, there you disable the Cities Skylines random police cars and keep activated only the vehicles you want - in our case this Passat, so only that vehicle spawn in city as police vehicle.

Any advice on how I can get this working with: https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=839022950 ? Thanks!