That's nothing. My 2003 S430 (W220) has four fuse boxes. And some
electrical items have "electronic fuses" as MB calls them. It's a
fancy name for saying that they're using an SCR to control a
circuit, and it limits current if it sees a ground or short circuit.
Makes troubleshooting tough sometimes, too. I had a side marker
light out. I test the bulb with a meter. Open circuit. For grins
I checked the socket for power with the light switch on. Nothing.
Further studying revealed that if there's no load, the "electronic
fuse" won't pass power to the circuit.
Put a new 5W bulb in and it worked.
Dan
More reasons why I don't want a MB made after 1990.
Proof the MB designers truly lost their brains. Bowties and
pixiedust, but none of the reliability and rationality the old German
machinists and engineers used to build cars with.
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