2003 E53 with a specific heated mirror issue.. Troubleshooting so far has consisted of: cleaning contacts of wires to ensure good test, checked all circuit breakers. 2003 bmw x5 3.0i ,219000km build date 2003-08-18 .
"Both exterior mirrors are automatically heated whenever the engine is running.". Clearly mine are either slow or not working properly.
Heated mirrors.. Of course that would be BMW's task to update software to work this way.. I've not had a problem with misty wings yet either.