W212 engine managment light

[SHAMGIT]

W212 220cdi blutec 16 reg

Engine warning yellow light on
Have scanned with i carsoft.
Only thing coming up is code

A3A813
window heating.. open circuit..
I have tried to remove and it wont delete.. Cant get rid of warning light.
Any ideas how to solve problem and if its solved will i then be able to remove engine warning light.

Thanks in anticipation for any help

 

[LostKiwi]

That comes up when you scan the engine module?