S600 TT - the dreaded P0410 code (and the fix) - Page 2 - Mercedes-Benz Forum
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post #11 of 28 (permalink) Old 01-31-2019, 08:39 AM
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Hi @cowboyt ,

It's been minus 11c here all day even chilly in the Workshop, the Gas Space Heater has been on / off / on / off all day, fairly eating it's way through the propane bottles
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post #12 of 28 (permalink) Old 01-31-2019, 08:47 AM Thread Starter
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Looks rather picturesque, actually, sort of like post card material. And yep, that's about how it looks here, too. I envy your having a building in which to do this sort of work.

At some point, I will be building a garage. My neighborhood is one of the older (for the United States, that is) ones before garages became a thing. When that happens, I will be doing a lot more car work in the winter.
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2000 S430 (Dad's car, used for special occasions)
2000 S500 (wife's DD: my first W220 project car)
2003 S600 ("sex on wheels"--second w220 project car)
2003 S430 (one of two current DD's--third W220 project car)
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post #13 of 28 (permalink) Old 01-31-2019, 10:30 AM
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Hi @cowboyt ,

It is beautiful scenery here and the snow looks lovely ...............

Trouble is I had a Twin Wheel Iveco Builders Tipper Truck here Tuesday, totally blocking the Workshop doors, (too big to fit inside Workshop), Rear Discs, Calipers, Pads etc etc, which were mounted behind the Rear Hubs, so needing Halfshafts removed, then undo the stoopidly tight 65mm Hub Nuts and get the Hubs off before replacing the Brakes ................

Yep, 6" of snow Tuesday, I was absolutely soaked and frozen by the time I finished the horrible thing

Did I ever mention I HATE TRUX


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post #14 of 28 (permalink) Old 01-31-2019, 11:49 AM
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"It is beautiful scenery here and the snow looks lovely...."

Sounds almost romantic.

That's just a little sprinkling - if you like it that much come to my place; we are buried by it, and it's been - 20C and colder almost every night, with daily snowfalls around 10 - 20 cm.

I HATE JANUARY winters (and don't do any work on cars as I have no garage to use - mine is full of junk!).

Had a 2 day thaw with a refreeze, so you can't even shovel it away.

A well......
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post #15 of 28 (permalink) Old 02-25-2019, 07:48 AM Thread Starter
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OK, it was 60 deg. F. (about 15 Celsius) yesterday, and mostly sunny, so I tore into the S600 TT and looked at the vacuum lines. They look like they're in good shape, and indeed, I had replaced several of them a year and a half ago. It makes sense that a line somewhere would be slightly leaking, but I'm not sure where else to look.

Currently the air filters are out, and the intercoolers are being hung up by bungee cords so I can replace the tandem (ABC/power steering) pump's fluid reservoir tank, so this is a good time to start looking for things. Anything else I should be looking at?

2000 S430 (Dad's car, used for special occasions)
2000 S500 (wife's DD: my first W220 project car)
2003 S600 ("sex on wheels"--second w220 project car)
2003 S430 (one of two current DD's--third W220 project car)
2005 E320 CDI (the other current DD--first W211 project car)
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post #16 of 28 (permalink) Old 03-11-2019, 08:33 PM Thread Starter
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The CEL is coming on more frequently after clearing it. So, I took a look at the readings. After running the Secondary Air Pump for 60 seconds, and you can definitely hear that pump working, the readings never go below 49mv, and they seem to settle at 54mv. That's out of spec; it should be below 40mv. The last time I saw out-of-spec readings like that, the Purge Control Valve had gone bad, almost a year and a half ago.

Therefore, a new Purge Control Valve is on the way, as of tonight. The part # is A-000-470-88-93. Let's see if that fixes things again. If it does, that means something is messing the PCV valve up. Any ideas?
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post #17 of 28 (permalink) Old 03-12-2019, 01:38 AM
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Hi @cowboyt ,

Have you tried spraying Carburrettor Cleaner or Starting Fluid all around the Vac Pipes and Manifolds etc with Engine Running ?

When you have a leak and spray that stuff near it you can hear the Engine note change

HTH,
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post #18 of 28 (permalink) Old 03-12-2019, 07:25 AM Thread Starter
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I have not yet tried that; didn't occur to me. Thanks!
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2000 S430 (Dad's car, used for special occasions)
2000 S500 (wife's DD: my first W220 project car)
2003 S600 ("sex on wheels"--second w220 project car)
2003 S430 (one of two current DD's--third W220 project car)
2005 E320 CDI (the other current DD--first W211 project car)
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post #19 of 28 (permalink) Old 03-25-2019, 06:01 PM Thread Starter
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Replaced the PCV and cleared the codes. Ran the Secondary Air Pump with SDS. Now it's acting like it was originally in 2017, i. e. the voltages are fluctuating between 90 mv and 800 mv even with the pump on. It's certainly not going down to below 40 mv. This really sucks.

On the way home tonight, the Check Engine Light came on again, close to home. This was after about 25-30 miles of driving, post-PCV-replacement. I actually heard the Secondary Air Pump come on while at a stop light, so I know that the pump itself works.

2000 S430 (Dad's car, used for special occasions)
2000 S500 (wife's DD: my first W220 project car)
2003 S600 ("sex on wheels"--second w220 project car)
2003 S430 (one of two current DD's--third W220 project car)
2005 E320 CDI (the other current DD--first W211 project car)
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post #20 of 28 (permalink) Old 03-25-2019, 06:53 PM
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I don't know about the V-12, but on the V-8 engines, one common cause for the P0410 code is that the air passages into the exhaust port areas can get plugged up with carbon.

A couple of years ago, I used a variable-speed drill driving an eighteen-inch piece of square 0.105" string-trimmer cord to roto-root the passages and clear the code on my 2003 S430. For some reason, the port on the driver's side seems more prone to plugging.

Of course, I later simply used SDS to tell the computer to ignore the P0410 code...

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