Hi Cole, I have a 2012 MB B-52 23V with the PCM 343 and I have not received a letter. If you find out more info I'd appreciate hearing about it. Hopefully mine is OK, but at least it sounds like they are going to fix the issue. JB
Originally Posted by SkySki
Got a letter from PCM that my water circulation pump impeller did not meet the hardness spec on the metals. Says I need to contact my dealer for a free replacement. Anyone else get this?