Keep blowing fuse with lighter - replaced lighter 3x's and doesnt work

Try disconnecting the cigar lighter altogether to see if the fuse continues to blow. If it keeps blowing, you have a short somewhere in the wiring, if not the lighter is causing the problems.

1998 mercedes c230 wire diagram Bing images

What is the question?

Not much point in replacing the fuse,probably
just blow again

Have to get the lighter out & unplugged, to see if the fuse
will hold, then I would guess replace the failed lighter part

Did you try & use it for other accessories & blow the fuse?

look inside the socket coin fall into the socket

maybe a bad lighter socket or wires in the back of it.
You don't have to remove the center console to check the cigarette lighter electrical connection. Just pluck the base out of the hole and you will know if it is connected properly back there ....Or replace it. Not big bucks at all :)

There are actually FIVE cigarette lighter/ Auxilliary Power Outlets shown in the wiring diagrams for your vehicle.
The Instrument Panel [1] Accessory Power Outlet (Cigarette Lighter) is protected by the "LTR" Fuse (# 53 - 20 Amp) in the Power Distribution Center (PDC) in the engine compartment.

The Instrument Panel [2] Accessory Power Outlet is protected by the "AUX PWR" Fuse (20 Amp) In the Instrument Panel Fuse Block on the left side of the dash.

The Center Seat Accessory Power Outlet and the (two) Center Console Power Outlets are protected by the "AUX PWR 2" Fuse (20 Amp) In the Instrument Panel Fuse Block on the left side of the dash. NOTE: If your vehicle is not equipped with the Center Seat Accessory Power Outlet, or the Custom Floor Console (optional), this fuse position will most likely be empty.

Start with a visual inspection of the cigarette lighter. The chromed walls are the negative pole, and the bottom part is the positive (12v) pole. Evidently these two parts should not come in contact with each other, and if they do bend the metal with a fine screw driver. Make sure the vehicle is off, and preferably, with the fuse taken out, because the screwdriver will make a short. Also check that nothing metallic has dropped into the hole of the lighter, such as a screw. If nothing is found, take out the lighter socket and disconnect it. Check if the fuse continues to blow, and if this is the case, you know that the lighter is not the culprit. I left the radio as a second choice because reaching the back of the radio to unplug the harness is difficult, it requires disassembling the center console (Check elsewhere on fixya for the procedure, i think i published it once). Unplug the radio and see if this stops the fuse from blowing. If it stops shorting, then you know its the radio, but if it doesnt, then the wiring harness is shorting somewhere, in which case, i would recommend a mechanic, unless you are really good at disassembling dashboards, and checking for continuity and voltage on electrical circuits.

When your lighter lit on fire it could have melted the casings on the wires shorting them together. This would cause the fuse to blow every time you use the lighter. Also it is the same fuse for both the lighter and obd (which in your owners manual will be called Data Link Connector, or DLC). Replace the fuse but don't use the lighter. When you plug in the DLC it should work just fine then try the lighter. If fuse blows you have to fix the wiring to the lighter or possibly the lighter socket.

DASH HAS A SHORT CIRCUIT.DASH NEED REPLACING BUT CHECK FOR SHORTS IN THE WIRES TO DASH.DONT PUT A LARGER AMP FUSE IN A CIRCUIT TO KEEP FROM BLOWING FUSE BECAUSE IF FUSE DONT BLOW WIRES GET HOT IN THE CIRCUIT THAT HAS A SHORT IN IT AND CAUSE A CAR FIRE.

make sure nothing in cig lighter socket..coins,etc..if nothing present,unplug cig lighter socket and replace fuse..if fuse doesn't blow,it's the socket causing fault..if it does,unplug radio,plug cig lighter back in and replace fuse..if fuse doesn't blow,radio is cause of fault..if it does,then ther is short in wiring