Saw someone's post recommending revving to 3000 rpm with expansion tank cap off three times....that seemed to do the trick. So I'm all set.

In general, though....as long as there's enough coolant in the system to cool the engine, will the system eventually burp if the car is driven enough? Or can some air pockets be pretty stubborn?

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles
06 E320 CDI "Rutherford", Black on Tan, 178k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 75k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife