Quote:
Is it correct that using an unregulated adapter with more than the required amperage mean the adapter will supply slightly more voltage?

Yes. But how much depends on what current rating the transformer has.

Personally, I'd probably try a 3V regulated supply and see if it works and go from there
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Christian
#40104192 120Gb (no longer in my E36 M3, won't fit the E46 M3)