eddieo45

....it hangs off the CLA lead in the ashtray:


the two leads are brown and blue/gray, which is the same as the ones that go to the lighter, but they're smaller gauge. There's a MB part number on the side: 030 545 28 28. Also a Tyco #: 1-969521-1



I'm curious what option it might be for, and whether it's a potential power source. Thanks.

pcy

if you have a multimeter, why don't you check the voltage on those wires (with ignition ON and with ignition OFF).

maverik259

ya i was wondering that a while back when i did my h/u install and digital hvac install..

dynomite05

This is what the EPC shows for that part #

pcy

if it's for microphone, then never mind about checking the voltage across those two wires.

maverik259

dam I checked EPC for that part and I couldnt come up with anything lol. My hats off to you.

dynomite05

lol, I stumbled upon the parts search in the EPC. I was clueless for a few months.

Hit F11 when your in the EPC and the parts search will come up. Make sure the tab "part without vehicle data" is selected. Type in the part and press enter. All the applications for that part should come up.

maverik259

oh ya i did that before and like 50 things came up haha....i didnt see anytihn for the w203

dynomite05

lol, yea it should be there if you scroll down. I scrolled to the W209. You could click on any of the models though and the part would come up.

Moviela

The wires are too fat for a microphone, and the 203 mic is in the headliner. The mic wires are shielded. The brown wire is almost always Nr. 31 and connected to the vehicle ground. The blue wire might be connected to the interior lighting circuit. Being in the center console it migh be for illumination of the PRNDL indicator on automatic cars, or the lighting on the phone setup. Connect a volt meter and turn on the lights. Adjust the dimmer knob on the instrument cluster. If the voltage goes up and down, you know how it is used.

There is usually a tag near the connector on the harness that has the circuit reference number. Usually a letter followed by 1 to three digits. With that number, it can be looked up on the wiring diagram and pinpoint its use.

dynomite05

The OP has a W209 not W203

maverik259

interesting...and ya i was gonna say, why would a mic wire be down by the ashtray, lol

eddieo45

I never have any luck with EPC, something about my Java, though I know of no other sites with issues. Odd that EPC would list it as a mic connection, don't ya think? I installed MHI/UHI for Bluetooth, and it seems my car already had/has a mic. Whatever it is, it seems unlikely that it will power a 12v receptacle, right?

Xhale707

Some of the newer cars Have a cig lighter inside the ash tray part.. That could be the wiring plug for it if its 12 volts

pcy

Take a Voltmeter/multimeter and measure the voltage across those two wires (with ignition ON and then ignition OFF).

maverik259

thats not what the plug for the cig lighter looks like and i'm quite sure his car has one in his ashtray anyway...plus i had mine apart the other day and I did not notice that plug under my ashtray whatsoever...my cig lighter wasn't working and i got tired of plugging my phone into the receptacle behind me...

eddieo45

yeah, I don't have a voltmeter but I hear ya.
You are correct; I have a CLA, which is why I identified this lead as "hangs off the CLA lead in the ashtray". You can see it below:


Sorry not to be clearer about the fact that it's from my 209; I actually posted here in 203 on purpose, cuz I've found a lot of really knowledgeable members here (ironic that it would be Wes from 209 to find the part in EPC!)
Wes, can you look up the "microphone 2-pin MQS;X58/3" in EPC?
No tag on the harness, though I have seen them on the fiber optics when I did my Bluetooth. Like I said, I assumed they were power because they're the same colors as the two wires that do go to the lighter.

eddieo45

hey Wes, I took a crack at getting in to EPC again and was successful. When I scrolled down to 209 there were a few options, so I selected appropriate ones for my car, like North America, CLK350, etc., and I got this slightly different description:

as well as this sketch:


Clicking that "Code 220" link gets this:


So it's got SOMETHING to do with Parktronic....the switch light maybe?