I have a complete mobile Bosch CO tester for adjusting MFI as is specified in the CMA book.
This is the tool issued to Porsche dealers when these cars were new.
Works perfectly and is extremely nice condition- virtually unused
Also includes P 228c protractors
and pointers, P234-2 lever, 229-3 screwdriver, 233-2 Manometer, and linkage gauge
2500 +ship
Dan@danielJacobsllc.com