Excellent. Those are about where my temps are at with similar ambient outside temps. Now, if you really want to put the icing on the cake, wire up your aux wp to come on at 91°C and to continue to run during shut off until temps are back at about 85-87°C. You won't regret it. I've already posted several videos of this in action. This will keep your engine from heatsoaking and peaking at 120°C during start up after driving and parking the car for a bit.

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1990 190E 3.0L

Any links on how to wire that in?

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Attached is a photo. It's the same as the electric fan installation (Electric fan install)
Just make sure that you wire #86 on the relay to a constant power source whether or not the key is in the ignition. This will ensure that the water pump will circulate the coolant after you shut the engine down. Once you get everything wired in, Take it out to get the temps up and then park it and shut the engine off. You should still here the water pump running. Go and put the key back in and with key on/engine off look at the temp gauge and you will be able to see the temps drop.

Attached Thumbnails

 

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1990 190E 3.0L