Yea mine had one originally but it was designed to run at full throttle on the Autobahn. For normal street driving at 2500rpm it's much less stressful. I may just bypass it. If I am really concerned I could install a oil temp gauge in a inconspicuous location. I thought of mounting the sensor in the oil drain plug by drilling and tapping it. With 7-8 qts of oil in the giant, finned oil pan it should not get too hot.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT