Xprog V5.7 here is the tip use to read Mercedes-benz W211 EZS
This is the W211 EZS
3k91d mc68hc912dg128a
Using Xprog 5.70 programmer for it
And this is the pinout ezs w211 with xprog-box v5.70
Red= vcc
black = GND
purpel = bkgd
yellow = reset
and coaxial
Just tips, hope it helps