I was wondering the same thing. When I put my key in the ignition switch, turn it to glow (while the driver's car door is open) my dome light blinks oddly.

I have noticed similar blinking patterns when using scan tools on old chevys, you would ground out a terminal and the check engine light would blink a code that you pieced together and then would look up. Is my benz blinking in code? Is there a code sheet to read these blink/fault/codes?

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MIKE
1987 300D Turbo, 225K
124.133/603.960