Was the electrical diagram legible enough to read? I downloaded it and it just is worthless. But so it the wiring practices of MMC. Checkout this fine example of dangling connectors that bang into the aluminum sides and will undoubtedly cause wire fatigue and failure if not fixed. I fixed mine but Lord knows how many are out there with this lurking in their future.

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And then there is this neat bundle, which is not terrible. The photos of the underside near the oil filter are much worse.

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The light at the end of the tunnel is actually a train. 2019 M3W