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OK - the local dealership just called me. BMWNA believes my BMW portable navigation system, installed by BMW, is causing a feedback into the CAS.
From the dealer - "The CAS system also powers up the bus circuit. BMW engineering has experienced these issues on other 1 series with the add on Nav. No determination from BMWNA as to why."
The portable nav system does not integrate into the bus - it only draws power. But they have advised the local dealer to rewire it into the cigarette lighter circuit.
We shall see...
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'09 135i ragtop, 6MT, Crimson, Sport |