In the couple of months I've owned my CDI, operating temp has always risen to a steady 82C. However, I notice that the stock thermostat is 92C. Given that the PO replaced the thermostat at the dealer 35k miles ago, I would assume it's rated at 92C.

Is my 82C a perfectly fine operating temperature? Or should I think about replacing the thermostat?

Of course haven't yet driven the car on a hot summer day...perhaps then it would be closer to 90.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 158k miles
06 E320 CDI "Rutherford", Black on Tan, 177k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 144k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 72k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife