Hi, I have a 1988 300ce with 180K on it. I am thinking about using seafoam to clean any carbon deposit in the engine. From the seafoam instruction it suggests one to use the PVC or Vaccum Brake Booster line. First of all, could some one tell me the location of those lines (pictures would be great)? Lastly, would it allow the seafoam to reach all the cylinders or another method is better? Thanks

Rick