Found some stuff -
Seems Ram(m)schaufelpanzer or Panzer-Strassenraeumgeraet (tank street dozers) were used to clear rubble from bombed cities in early 1944 and continued after the war. There are pictures of (a unique?) panther and notes that say PzIII and IV were used.
Picture of panther with german annotation:
Attached more pictures of Panther
Some more pics of PzIV / StuG IV here:
https://www.flickr.com/photos/deckar...n/photostream/