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sorry, i've used incorrect word "jack" instead of "plug"
in the second test you should look for the red light from plug which is connected to MOST jack on MULF
after that we can suppose if MOST ring is operational and HU can talk with MULF and MULF can talk to HU
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E81 2007 130i 6cylinder Montego blue
Retrofits: Harman Kardon, High-beam assistant, Removable tow hitch. Auto-dim folding exterior mirrors. Lumbar support. Perfomance Brakes.
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