Quote:
Originally Posted by GriffX5
Is this also true of the compass? I want to upgrade to a mirror with Homelink but I haven't seen one w/o the compass and was worried that it would require the car was prewired for it. If power is in the mirror and none of these items needs to talk to anything outside the mirror I should be good to go right?
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If past design elements carry over...then yes...the compass feature is also contained within the functions of the rearview mirror and doesn't require communication with modules outside the mirror and should only require power through the existing harness.
I've seen e38/e39/e46 owners install the e53 compass mirror with no problem and no additional wiring as well as the rearview mirror from an e46 convertible which has the homelink buttons built into it...and no additional wiring was needed for either of those features to function.
Setting magnetic deflection zone: - Switch on ignition.
- Using a suitable tool (1), press push-button in area (A) of mirror (2) until a number appears in compass display (B)
- Press push-button repeatedly until number of desired zone appears
- Wait until direction display appears
- Magnetic deflection zone is now set
Calibrating compass:
- Switch on ignition.
- Using a suitable tool (1), press push-button in area (A) of mirror (2) until ”C” appears in compass display (B)
- Drive vehicle 2 to 3 times in a circle at approx. 10 mph
- Calibration process is completed when direction display appears
But since there's no vehicle info about your e70...I would also refer you to the part database so that you could also check the 11 digit BMW part nbr because there are some mirrors that have a date range in regards to compatiblity with an unknown model year/build date: