You might also want to look into the clutch fan and make sure it’s turning on when the car gets up to temperature. I replaced the t-stat, radiator and water pump and nothing helped with my 87 300sdl overheating. I finally took it into an indy shop and they told me it was the clutch fan. I replaced it and she stays right at 80 C. It’s something to check out if you still have problems.

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Professional greasecar installer
Austin TX


98 Jetta TDI with grease car kit + veg-therm (totaled)
87 MB 300SDL running on B99 / greasecar kit + 30 fphe
www.austingreaseguys.com

I would feel around the radiator matrix with my hand to check for cool spots.

If your fan clutch were bad, the engine would overheat in stop and go traffic...while underway the air being forced through the matrix is enough alone.

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Current cars:
2000 ML55 AMG, 174k miles
2003 C240 T-Modell, 202k miles
1995 S320, 207k Miles