Is this car running hot or what??
Thread Starter
Junior Member
Joined: Oct 2017
Posts: 53
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2016 CLS550 4matic
Is this car running hot or what??
Ok I have no lights on and the gauge stays just above 85 and when I use the data screen to see engine data the hottest ive seen it 98 then it begins to drop in temp to the 80's. I go by the hood and fender and its hot as hell and I mean hot to the touch. I open the hood and i can feel the heat!! so I leave the hood up in the garage to help cool this phucer down. Now do these 4.7 twin turbo engine run that hot?? Again no warnings nothing as it all seems normal.
A330PYLT
A330PYLT
Senior Member
Joined: Feb 2009
Posts: 292
Likes: 46
From: Vancouver, Canada
2016 CLS550 4Matic
Ok I have no lights on and the gauge stays just above 85 and when I use the data screen to see engine data the hottest ive seen it 98 then it begins to drop in temp to the 80's. I go by the hood and fender and its hot as hell and I mean hot to the touch. I open the hood and i can feel the heat!! so I leave the hood up in the garage to help cool this phucer down. Now do these 4.7 twin turbo engine run that hot?? Again no warnings nothing as it all seems normal.
A330PYLT
A330PYLT
Thread Starter
Junior Member
Joined: Oct 2017
Posts: 53
Likes: 1
2016 CLS550 4matic
A330PYLT
MBWorld Fanatic!
Joined: May 2015
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Likes: 1,011
From: Miami, FL
2003 CL 600
Perfectly normal, anything up to 100C is considered ok. 80-85 is where the thermostat starts to open, and by 96-98C the fan is running to keep it from getting hotter. You will see the temps sit ad 95C in traffic or parked running, but drop some on the highway if conditions are right, closer to the 85 mark. On the new ones they don't really cool back down, the higher temps are actually better for engine efficiency, so they stay warmer.
Thread Starter
Junior Member
Joined: Oct 2017
Posts: 53
Likes: 1
2016 CLS550 4matic
Perfectly normal, anything up to 100C is considered ok. 80-85 is where the thermostat starts to open, and by 96-98C the fan is running to keep it from getting hotter. You will see the temps sit ad 95C in traffic or parked running, but drop some on the highway if conditions are right, closer to the 85 mark. On the new ones they don't really cool back down, the higher temps are actually better for engine efficiency, so they stay warmer.
A330PYLT
MBWorld Fanatic!
Joined: May 2015
Posts: 4,037
Likes: 1,011
From: Miami, FL
2003 CL 600
There are no gauges for the turbo coolant system. You should have the small reservoir on the center of the engine for turbo intercooler coolant. They are self bleeding systems, they will continue to drop until all the air is out. The intercooler pump is electric, not the same as the engine coolant pump.
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MBWorld Fanatic!
Joined: May 2015
Posts: 4,037
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From: Miami, FL
2003 CL 600
It's down in the front bumper area behind the right front fog light usually. The one you see on the frame rail is the auxillary heater circulation pump.
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MBWorld Fanatic!
Joined: May 2015
Posts: 4,037
Likes: 1,011
From: Miami, FL
2003 CL 600
Normal, from 80-100 is the range it cycles through depending on conditions and airflow. As it nears 100 the fan comes on higher and higher to control it, as it drops towards 80 the thermostat closes and limits cooling to maintain operating temps.
