German Police may not own any private firearms unless they have a privat permit, either as a hunter (Jagdschein) or as a sportsman (Waffenbesitzkarte). The service weapon does not belong to them, it belongs to their police dept.
Some police officers take their service weapons home, where they are supposed to be stored securely. As far as carrying their service weapons around off duty... I think that would be a special circumstance requiring special authorization. Your normal beat cop isn't armed off duty. There are certainly special units, for which other rules apply.
I would be very surprised if any German police officer is allowed to carry a privately owned firearm (other than during a shooting contest or while hunting) unless they had a -Waffenschein- listing that weapon. Your normal Policeman (or woman) has zero chance of obtaining a Waffenschein. Zero. There may be, I say may be, some higher Police officials who are deemed at such a risk that they may have a Waffenschein, but I'd be surprised. They would have personal protection. I don't even want to think of the trouble that would occur if any official here used a personally owned firearm to shoot anyone.
I would not be surprised if there were different rules in different states.
I actually know where Wilmersdorf is, I spent 2 years living "right down the road" from you at McNair Kaserne on Goerzallee, and in early 1981 two GI's in my unit who suffered from the delusion that they were back home in the ghetto they came from decided it would be a good idea to start mugging German civilians at knife point. They picked an off-duty West Berlin Police Officer in civilian clothes. The one with the knife got shot. Unfortunately he didn't die.
"We do bad things to bad people".
Could be a specifically Bavarian thing.
A colleague, who was a police officer in his ‚former life‘, was offered to buy his former service pistol when his department switched to P7s, before he left the police. Although he didn‘t have a carry permit after leaving the police...
Detectives (Kripo) And SEK special units are not the same as regular beat cops. They operate under other regulations. The main police force are the beat cops.
Blah blah blah WHERE ARE THESE P7s!!!???
Hokey religions and ancient weapons are no match for a good blaster at your side, kid.
Seriously: most are still in the holsters of their users and will get phased out as the SFP9-TRs become available.
And then they will collect dust in a bin in the corner of the armory, until someone in charge makes up their mind, what to do.
Mind you: not whether to sell them, but whether to throw them into the smelter right or (more likely) whether to separate plastic and metal(s) before. You know us germans are serious about sorting out garbage ... 🤪