Hi there all,
Just going through the parts list for my Z3 on the ETK program on my computer, when I have encountered a query.
When looking up the part number of the top I-panel on the drivers side (the part that houses the instrument cluster), i noticed that part numbers were specific to certain letter codes.
eg part number 51 45 8 401 568 applies only to Q4SW/R8SW/O2SW/V4SW
whereas number 51 45 8 399 948 applies to D5AT/D5AQ/D5TC/H1AT/H1OS/K3ON/ ETC
these were the only 2 in black whereas other colours have different designators
Any ideas on what these are referring to?

Thanks
Marc