190D electric fan install- temperature switch suggestions?

[w123fanman]

I may be installing an electric fan in my 190D 2.5. The belt snapped a couple of weeks ago because the tensioner pulley went and I think it may have damaged the fan clutch. The fan now has a noticeable wobble in it. The clutch is tight but I am afraid the bearing may have gotten damaged. I have been toying around with the idea of converting to an electric fan but may have a reason to now. Sure I could replace the fan clutch but that's about $90 and will take a week to get here, plus the fan itself may need to be replaced as well anyway as it is pretty nicked up, that's another $80 or so (I forget the dealer price).

I'm going to check it out on Saturday if the dealer gets the correct bolts from MBUSA for the water pump. They thought that the bolts MBUSA sent them were too short and they were correct, the correct length is 35mm and the ones they were sent were 12mm so I have been waiting for those to get in so I could replace the water pump with a Mercedes remanufactured water pump (which was also part of that order).

If I have to replace the fan with an electric one I will need something to use as a switch for the low speed function. I have an electric Volvo fan sitting in my basement that was going to go on a different car but doesn't need it right away. It should fit in the stock fan shroud for the 190D. I may delete the aux fan for less restricted flow across the radiator and condenser.

I will have the high speed kick in at 105C and when the AC needs it like the aux fan normally would, but since I won't have a clutch fan, I need a temperature switch that will will kick on the fan at low speed somewhere around 88C-92C. Does one of the many temp sensors on the engine fit that description? If not, any suggestions of what cars I could get a switch like that from or websites that sell a switch like that?

I would prefer to use one of the extra sensor bungs in the engine for sensor vs one of the glue-on type temperature switches.