As I understand it, the correct way to measure the fluid level on the 722.6 tranny is first to measure the fluid temp at the pan with an infrared thermometer and then check the level. However, as a ballpark quick 'n' dirty approach, is it fine to go on a 30 minute highway run, assume the temp is roughly 80C, and then measure the level?

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 157k miles
06 E320 CDI "Rutherford", Black on Tan, 175k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 144k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 70k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife