The cost of this problem you give seems a bit high to me, but I cannot find a cost quoted here.
Mark wrote that on July 4th :
in thread :
https://www.crossfireforum.org/forum...trol-unit.html
Used parts or Mercedes parts will NOT work, it HAS to be a "Crossfire" version of SKREEM with YOUR VIN in it, so you have one option here. NOW, beware that horror stories have been told of people going to a dealer for a SKREEM and after 1-3 weeks, then being told the PTCM is bad - and for $3300-$3500 they can have their car back. HOPEFULLY, your dealer knows what they are doing, and they get it right the first time.
I was actually a bit low, but then he was talking SKREEM and PTCM.