Yes, IC is the common acronym for intercooler. If it is still under warranty I would take it to the dealership. Before you go there arm yourself with several printed threads that are available on here as well as MBWorld.com—just do a search for "intercooler pump" and you will have plenty. That way they can read for themselves what the symptoms are and more importantly, the fix.

If it isn't under warranty I would go through LET for the Johnson CM30 as they are a reputable and helpful tuner.