It's a possible but quite a way from the centre. Not many choices and all are expensive. The closest is 92 euros for 2 nights. Ouch.Motorhome Oasis Berlin,
Hochstrasse 4, Kathleen Schmidt, phone
: +49 175 2466247
camping@wohnmobil-oase-berlin.com
http://www.wohnmobil-oase-berlin.com
found this in this years Bordatlas
I think this has just reopened but Tegel is quite a distance from the centre. Will probably try it if nothing closer.We stayed at this one in 2016. It had 3A electricity which was weak as hell so I paid for an upgrade to 16A. It is handy for the tube/metro into the centre of Berlin and also close to a restaurant or two and shops from memory.
Wohnmobil Stellplatz Berlin schnell im Zentrum der Hauptstadt
Wer nach Berlin mit dem Wohnmobil reist, der findet mit dem "Wohnmobilpark Berlin" bei Tegel einen guten Übernachtungsplatz.www.womi-on-tour.de
Just double check that they are still open though as I cant seem to see their website anymore.