No, the Citi is only secured with the belt, so it is ideal for rental cars and car sharing. The base is for the Pearl, Pebble and Cardiofix models, according to the MaxiCosi website https://www.maxi-cosi.com/international/car-seats/familyfix According to TCS, both solutions are very safe

The Maxi Cosi is suitable for a weight between 0 - 13 kg and a height between 45 and 75 cm.

found this article: https://kindersitz-im-test.de/maxi-cosi-citi/#gibt-es-fuer-die-maxi-cosi-citi-eine-base "Is there a base for the Maxi Cosi Citi? No, there is only an Isofix base for the Maxi Cosi Cabriofix. The Maxi Cosi Citi and the Maxi Cosi Citi sps are attached with the vehicle's three-point belt in the opposite direction of travel. The attachment can be made on the back seat, but also with the airbag turned off on the passenger seat.

Unfortunately, I cannot find any information on this, it should only be compatible with Maxi-Cosi prams

Thank you very much for pointing this out, this was indeed an error that has been corrected in the meantime! :)

yes, this seat is certified.