Super sensitive to voltage, I trust you used the jump points under the hood as well. If so, check the voltage at rest after sitting overnight through the cluster; or you can take it to any auto parts store and have them test the alt and battery to rule out power issues.

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740iLDUKE
01' DINAN 7 S62 Swap - Stratus Grau
(1587 produced in SG 440)
02' 4.6is DINAN X5 S2 Supercharged
833/3258 produced | 1/27 Dinan X5's