1988 300E, What's that ticking noise?

[josephcraig007]

Hello everyone, new to the forum. I have a 1988 300E that I am restoring with 162,000 miles on it. Seems like the comfort circuitry fuse is shorting. But my real question is what is that tick, tick, tick ticking sound coming from my glove box? I took out the glove box and found an item with numbers written on it. Seems like vacum hoses are attached to it and it just won't stop ticking. I looked at it and found a part number: 124 800 0178. I called my local dealer and auto part store, but neither could tell me what this part was, or, what it did. I queried the net, but no matches.

I would like to replace it, however, I don't know what to ask for...any help would be greatly appreciated.

Joe in Snellville, Georgia

 

[television]

Go to this site and find your car, go to electrics and you will find the unit, they all have part numbers. let us know what the part is when you have found it

http://www.detali.ru/cat/oem_mb2.as...GA=722.625&CT=F&cat=45Q&SID=30&SGR=015&SGN=01

malcolm

 

[josephcraig007]

I have the part number: 124 800 01 78

 

[television]

Its up to you to find the part, I have given you all of the info, the pat number on its own is of no use.

malcolm

 

[Tekman]

I had that problem recently-it was the 4-Matic switch

My 1992 300E 4Matic normally runs very well, but occasionally the 4matic "Problem" light goes on, and the system has to be reset, or it will remain in 2WD mode---which requires disconnecting a battery cable for a few minutes. To bypass needing to do that, I experimented once with pulling out the 4Matic "(TEST/FUNKTION)" switch under the hood, and left it pulled out and midway between the two normal positions. Then, the next day while driving, I noticed an irritating "click...click...click" sound behind the glovebox somewhere. (If I am not mistaken, that "click" or "tick" was audible only when the vehicle was actually running, and possibly only when it was in gear.) After two or three days, I suddenly perceived that possibly putting the 4Matic switch in a "non-position" in an attempt to alleviate the need/bother of having to disconnect my battery might have been related to the appearance of the clicking sound. As soon as I had returned the 4Matic switch to a proper position, the clicking sound behind the glovebox vanished---and has never returned. (The 4Matic "Problem" light was still glowing throughout this episode---later I still had to disconnect the battery cable for a few minutes to reset the 4Matic computer, as per usual.) Whether the vehicle you are working with has 4Matic or not---you may find that some electrical connection or setting is miswired or conducting current in a "non-approved" manner, and thus eliciting the same response which my (relay?) did.