2006 E500 heated mirror


The passenger side mirror housing was compromised (broken and glued back tabs on the inside), so I got a same color mirror from a wrecker, the heated function didn’t work on it either. Got a used OEM glass from EBay, still no luck.
I can try getting a NEW aftermarket on EBay .
Could I have some wiring problem?
Mirror motor works, yellow side marker in mirror works ( did on previous mirror as well), but no heat…


