AA 4 never converted to the 1944 Gliederung. Instead its Gliederung was based upon the 43 type standard for the rest of the war. During 1944 it was not pulled out of the front to refresh. This happened only in January 1945.
The rightmost symbol is the schwere (s) Pz Späh Zug (7,5cm). A unit raised only on special order, which was issued in this case. It was equipped with the older Sdkfz 233. Six were issued in September 1943 and they were still around more than a year later. One was in repair at the end of 1944 and it seems that the problem proved to be fatal. Thus only 5 x 233 in March 1945, each with a 7,5cm Kwk and one le MGs. Note that their number is included in the total of 22 s.PSW.
The 1./AA 4 was a Panzerspäh Kompanie. As can be expected, not having converted to the type 1944 Gliederung, it has not become part of the Stabskompanie, neither did it adopt any Sdkfz 234 prior to 45, but instead had to work with a mixture of light and heavy armoured car during the whole year. The standard 1943 type was 6 troops of light four wheelers , 2 x Sdkfz 222 and one 223 (le PSW Fu) per troop and three heavy troops with 1 231 and one 232 (Fu) each, giving the grand total of 18 le PSW and 6 s PSW. At the end of 1944, we still find 4 x 223 (le MG), 5 x 222 (2cm Kwk), 3 s PSW (2cm KwK). The number of 22 s PSW in March is hard to explain. Delivery reports only report the issue of 7 s PSW at the end of January (most probably all calibre 2cm Kwk, so 234/1 at this date). I haven't found any deliveries of sPSW between March 1944 and this date, when one lonely 232 was issued (probably only to compelement the 5 x 231/232 issued in June 1943 and thus bringing the total of sPWS to the 6 allowed for). Imho it is a typo together with the number of le PSW. It should read 13 s PSW (6 older 231/332 and 7 new 234/1) and 4 le PSW, giving the correct total of 17 x 2 KwK.
The 2./AA 4 is special as it was the only Luchs Kompanie together with 2./AA 9 in the Wehrmacht. Of the 24 still with the Abteilung at the end of 1944, albeit more than 50% in the repair facilities, losses sustained had to be replaced by the more standard 250/9 by March 1945. This shows on the Gliederung as a separate Zug.
3./ and 4./AA 4 were both mounted on the 250 variant which was a rare sight by then and again echoes 1943. They were short of roughly a third of their armoured transport each. Interestingly, they used 250/9 also in these Aufklärungskompanien, which was non standard. It is even more interesting to note that this material seems to have been brand new. 47 le SPW were received in Jan 45.
The 5./AA 4 still had a Panzerjäger Zug, which had been dropped in the 1944 Gliederung offically. If the SP is an old Marder or a 251/22 is hard to tell. I suppose the latter, as the presence of another type of armour would probably have been noted next to the 22 mSPW shown. The unit then had 3 x 251/21 Drillinge 2cm and 6 x 251/9 7,5cm Kwks