Q: what would cause the a/c . heater blower fan to stop operating? on 1998 Mercedes-Benz E430

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The fan stopped working abruptly and the next morning when we went to start te care the battery had gone dead due to what seems to be a fan that was stating on after the ignitionwas turned off. Please advise on this ..
(2) Answers
(1) Comments
Possibly a faulty relay.Stuck-on killing the battery then failed because it over-heated the contacts 'til the battery went dead.Check for power at the blower motor and work backwards .OR consult a manual and work forward.