IBM 5162 - Documentation Pointers
"An Introduction to the XT Model 286"
Pages 1145-1152 (PDF pages 1177-1184) of Upgrading and Repairing PCs - Tenth Anniversary Edition
IBM manual - 'Technical Reference'
Found at this link
The 5162 and 5170 use some common cards.
Computerworld magazine article (Nov 1986)
Discusses apparent lack of demand.
Note that the AT (IBM 5170) used as a comparison is the AT of the time, the 8 MHz version of the AT, not the earlier released 6 MHz models.