I am also having problems with our 2014 Grand Cherokee. It was running beautifullybefore the S49 Update. We now have the fan roaring at extremely high revs for no apparent reason, fuel usag has gone from low 8.7lt/100km to 9.8lt/100km and several times the gear shift wouldn't disengage from park to reverse. Does anyone know if the troublesome update can be uninstalled by resetting the computer?
JC
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