I got a simmular problem.
Coding a E60 Pre facelift from 2003.
It probably got a software update about a year ago.
Now i'm retrofitting folding outside mirrors.
When I add $313 to VO I also got the next message:
"following feature is invalid for $313"
I am using V49.3 daten files...
Are there any newer daten files out?
Thx in advance.