Pearl, I have a 2002 BMW 540i. My nav display won't work, even though the radios still do. The DVD in the trunk nav system pops out, and I'm getting spurious messages like "Check Brake
Lights", and the heater isn't working properly. To get any level of heat (in cold weather) I have to keep it on full defrost for more than 20 mins. It doesn't regulate the temperature under any of the other settings, including air conditioning mode. What kind of reset can I do that will restore these functions, please?
JA: Cars do make very odd noises -- They help the mechanics figure out what's wrong. They are terrific with my old Grand Cherokee. Are you hoping to fix this yourself?
JA: Great! What have you tried so far?
Customer: I've tried a general reset - detaching the main battery terminals for a complete power down. I've inspected the fuses. Nothing seems to be dead or damaged.
JA: Is there anything else important you think the BMW Mechanic should know about your BMW?
Customer: It's been a delightful car throughout most of the 12 years I've owned it. These electrical problems started about a year ago, and have gotten progressively worse. They're annoying rather than debilitating.
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the BMW Mechanic about your situation and then connect you two.