Had the same thing on my 380SL - it's such a common problem in that community, it's standard practice to add a ground wire to the cluster. Look for a bad trace on the board first, then consider adding a ground wire.

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Current Stable

• 380SL (diesel)
• Corvette C5
• Manx
• Baja Bug
• F350 Powerstroke
• Auburn Boattail Speedster replica