I have checked all cooling related items and repaired a couple of questionable wire connections and everything is in good shape. The car runs at 80-90 C at highway speeds with is good for here, but if I am stuck at a light for a couple of minutes the temp gauge does a steady rise and tops 100 C in no time. The car runs ok but sometimes gets a little pinging above 100 C, so maybe I am worring about nothing.This is an even bigger problem for the big engined Mercedes here and you can get some really good buys in the summertime when everyone wants to dump them expecially the V-12's. I have driven some of these and they peg out very quickly at the lights. The temp here in summer is 115-120 F, unoffically it is much hotter in stop and go traffic.