80 to 95 C. Can't help with F.

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83 SD

84 CD

About 175 to 205 F is the ideal temp.

180 running normal and 195 under load are perfect temps.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Thanks for the replies. Im glad the temps are in range for now. But those water temps are when it was 32*F outside. I am a little nervious for the summer... Being new to this motor, how do they handle heat in the summer?

Mine will reach 110 C in the summer months, under heavy load i.e. climbing through a mountain pass in SoCal on the way to Vegas. It'll usually sit at 80 C under normal driving.

__________________
1982 240 D, 308,000 - 321,127 miles (sold)
1982 300 TD,166,500 - 226,000 miles
1998 E 320, 120,000 - 144,000 miles
2005 C 230 K, 26,000 - 77,000 miles (sold)

Thats too hot. You probably need your radiator cleaned or replaced. When its 90F out and I run mine hard I can barely get it over 88-90C. With my old radiator it would climb to 110 like yours does.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

The deserts and mountains of Southern California might well present challenges not easily duplicated in many parts of the country.

Climbing the hills of PA with 1100lbs of stuff in the car, hills so steep that the pedal to the floor in 3rd only gets you to about 35-40mph uphill....outside temp in the low 90's......my car went up to 110C...with a new radiator in similar conditions I can barely come close to 90C, even pulling a trailer on a very hot day.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

100 degrees C shouldn't be too hot. That's the third has mark, between 80 and 120. My temp gauge will climb slightly higher than the 100 C (110 estimate) mark. It only gets that warm when climbing 3,000ish feet, with three 200lb passengers, luggage, at Hwy speed, in 100 degree desert heat.

My radiator might not be new, but it does fine. The red line is at 120 C and boilover for the coolant is a little higher. Just keep it out of the red I say.

Now that fan that sits in front of the radiator, I have no idea if that works as it should....

__________________
1982 240 D, 308,000 - 321,127 miles (sold)
1982 300 TD,166,500 - 226,000 miles
1998 E 320, 120,000 - 144,000 miles
2005 C 230 K, 26,000 - 77,000 miles (sold)

If anyone wants to convert C to F. Take deg. C times 1.8 then add 32.

If you wanna go from F. to C. Take deg. F minus 32 and divide by 1.8.

Piece of cake!!!

__________________
Anything is possible if you don't know what you are talking about........

1985 Mercedes 300D
2007 Mercedes C-350
1980 Mazda Rx-7 (SA22C)
2005 Jaguar XJR
2007 Jeep Wrangler

No Both my vehicles will do all year with stock thermos.Its just in Summer I carry more heavy loads,and do not want to tax my heat range.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt