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In Reply to: How does your heated door locks work? posted by Esteves on December 14, 2000 at 10:22:26:
As the switches age they can become gummed up and stay on even in the summer. It was the mysterious solution to my repeated battery failure and even eluded a BMW factory trained mechanic friend of mine.
I think the heated door locks are standard items on the 7-Series (please correct me if I'm wrong). Just wondering, but how does heated door locks work. Obviously, it keeps the lock cylinder from freezing during winter, but: Is it constantly on all the time? Isn't that draining the battery? Is there a temperature sensor that if it reaches below a certain temperature, it heated door locks kick in? Is it like the heated mirrors in which they heated door locks are only active when the vehicle is on? (kind of silly) Thanks.