I think the real point is NOT with CO but with KL!

CO does NOT have ANY flights out of MUC but depends on KL for a codeshare. That agreement seems to be that KL can "reject" lowfare CO bookings on KL because the $ KL would get for their part of the trip is not worth it to them....
I had a BRU-AMS-EWR CO ticket where KL "pulled" the BRU-AMS portion on CO because the where not going to fly me for what CO wanted to give them......CO URGED me to argree to take the BRU-EWR nonstop (which I liked better but priced out more $$$)
I was told KL is able to pull the CO codeshare seat within 24 hours after ticketing if they do not agree with the price (for their portion) CO sold them for...

------------------
Viele Grüße

Oliver