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 > On Aug 22, 2015, at 12:47 PM, Rich Thomas via Mercedes > <mercedes@okiebenz.com> wrote: > > So my wife wants to power her phone from a cig plug charger in the 2012 ML. > There is a ciggy lighter in the front console, and the manual shows > either/both a 12V socket there, but hers only has the ciggy lighter. I try > to get the lighter out, push it down, nothing happens. So I pry it out, put > in the charger, no juice. > > So I pop the hood, find the fuse box and there are only a few small fuses in > there and some relays and a 50A or 2 and no chart of anything. WTF? So then > I download the manual (she does not leave it in the car for some reason) and > it shows there are 3 (!!!) fuse boxes scattered around the car, one in the > side of the dash by the pass door and another under the back seat. I try to > find the one by the door, there is none there. WTF??? So the manual says > "The fuse allocation chart is located under cover" of the rear one. So I > open that one up, it has some fuses in it too, but no chart. WTF???? The 79 > TD has a nice printed chart under the fuse box cover! I had to cut a little > tab on the carpet cover too to get it lifted up, so I guess no one has ever > been in that fuse box. > > Have the Germans completely lost it? (Or maybe the Alabama assembly > workers?) Neither of the boxes has a fuse chart, how the hell are you > supposed to figure out what fuse might need to be changed? Good news is the > fuses seem to be the newer flat things, I have a ton of those around but no > idea which one to pull. > > Off to the tubes to try to find a fuse chart.... > > --R > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
