Grey Fluid Leak - Mercedes-Benz Forum
 
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post #1 of 9 (permalink) Old 04-10-2019, 10:43 AM Thread Starter
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Grey Fluid Leak

I have found some grey fluid leaking from the underside of my car. I've only seen it on the ground, and it seems to be about 1-2 drops per month. It's on the ground right below where the rear of the engine/transmission would be.

It is opaque grey (does not look like metal), and when dry, it looks like dried salt water on the ground (chalky). I'll get a pic later today, but the edges of the fresh drop this morning were brown, and the rest of the center was grey.

Does anyone have ANY idea what the heck this fluid is? My engine oil is fine. The coolant is crystal clear. It's been going on for about 6 months.
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post #2 of 9 (permalink) Old 04-10-2019, 11:28 AM
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No clue why it'd be there, but my hydraulic fluid is dirty like that.

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I have found some grey fluid leaking from the underside of my car. I've only seen it on the ground, and it seems to be about 1-2 drops per month. It's on the ground right below where the rear of the engine/transmission would be.

It is opaque grey (does not look like metal), and when dry, it looks like dried salt water on the ground (chalky). I'll get a pic later today, but the edges of the fresh drop this morning were brown, and the rest of the center was grey.

Does anyone have ANY idea what the heck this fluid is? My engine oil is fine. The coolant is crystal clear. It's been going on for about 6 months.
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post #3 of 9 (permalink) Old 04-10-2019, 02:26 PM
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AC condensation?

If you or anyone owns an R129 1997-2002 did you know that none of the keys or remotes are available. Even if you don't need a key at the moment call your local MB dealer and inquire about having a key and remote made. If they get enough interest maybe they will show a little bit of interest regarding solving this issue.
Thanks
Mark
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post #4 of 9 (permalink) Old 04-10-2019, 03:39 PM
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That would make sense, especially if the undercarriage is dirty...

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AC condensation?
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post #5 of 9 (permalink) Old 04-10-2019, 05:15 PM
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My wife's Mustang is guilty of the same thing. I tracked it down to condensation leaking from a joint in the exhaust pipes.
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post #6 of 9 (permalink) Old 04-11-2019, 08:22 AM Thread Starter
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AC condensation?
My AC doesn't work (leaked so much, compressor doesn't run), so it can't be that.
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post #7 of 9 (permalink) Old 04-11-2019, 08:44 AM
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When you say the oil is fine, do you mean full? If its one to two drops you wouldnt notice and it would be gray when it hits the dirty metal

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AC condensation?
My AC doesn't work (leaked so much, compressor doesn't run), so it can't be that.
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post #8 of 9 (permalink) Old 04-11-2019, 09:25 AM Thread Starter
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When you say the oil is fine, do you mean full? If its one to two drops you wouldnt notice and it would be gray when it hits the dirty metal
Oil is full, clean, and has no visible metal (I change it myself). That's a good point sully, that could be it. I'll get under the car and see if I can see anything dripping from that area to put this mystery to an end.
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post #9 of 9 (permalink) Old 04-11-2019, 10:54 AM
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If it dries, it must be water. Maybe the windshield washer lines?
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