Not sure if I have any reputable machine shops in my area, that can work on this head that is. Is it a Mercedes specialist task to machine these out? I'm located in Yuma, AZ, smack between San Diego and Phenoix (2.5 hours either direction) The car itself is in amazing shape and everythijng works perfect, and for the price I feel I can justify any work I have to do. Should I just pull the heads (hard task from what I have read)? The VIN search said Canada Package, as the Speedo is KPH, I assume that's why.