'87 300SDL - what is this small filter? Its under the air filter, and a hose next to it is plugged. Not going to mess with it because car runs ;-> Also, what I that round module it's connected to...

I know, I know, I should read up on it... So don't flame me too bad. Still wrapping my mind around the whole diesel thing. But lovin every minute of it *singing*

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"Well, once again, we find that clowns and anarchy don't mix..." - The Tick
'94 E320 ~ Wikel
'87 300SDL ~ Frieda
'87 190E ~ Thurmond III
'84 944 ~ Schrickelgruber
'86 535i ~ Joerg

I'm not familiar with the SDL but it looks like that is an air/vacuum filter in the EGR plumbing.

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Yes. On the left side of the engine will be the normal pre (clear) and main (canister) filter--for FUEL. Added later was the cheezy oil-coalescing filter for the EGR system. Don't ask in this thread, but research on thine own--about alternatives to this filter and/or "options" for the EGR system.

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James Marriott
2003 Buick Regal
1983 300D (228k, frau Auto)
1996 Suburban K2500 (192k, 6.5 turbo diesel/4WD towmaster 10,000)
www.engineeringworks.biz
1987 300SDL junker 170k
1982 300SD junker, 265k

the shutoff diaphragm is known to rupture and dump oil into the cabin... Booster, etc... the "filter" is really just a clear spot in the vacuum system to allow a heads up that it has occured prior to gobs of oil dumping onto your pants...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

It is an air filter, and diagnostic tool/protective device.

You can look at it to see if the vacuum system is drawing engine oil in.

Here is another application of the same function.
"Hens tooth" 1985 300D vacuum filter dark black



.

Ok, mine was on the line from the vac transducer/ exhaust gas recirculation valve.

Should I put one on the shut-off valve line also?

__________________
"Well, once again, we find that clowns and anarchy don't mix..." - The Tick
'94 E320 ~ Wikel
'87 300SDL ~ Frieda
'87 190E ~ Thurmond III
'84 944 ~ Schrickelgruber
'86 535i ~ Joerg

MB didn't think that line needs a filter.

Sixto
87 300D^2

I would suggest it.

.

Since I'm disabling the EGR and AVR I'm moving it to the shutoff line.

Of course, AFTER I diagnose and fix my present vac problem (separate post). I now have my own Mityvac ;->

__________________
"Well, once again, we find that clowns and anarchy don't mix..." - The Tick
'94 E320 ~ Wikel
'87 300SDL ~ Frieda
'87 190E ~ Thurmond III
'84 944 ~ Schrickelgruber
'86 535i ~ Joerg

MB also wants you to pay them to diagnose your problems and buy all your parts from the Dealer and have them installed by their Mechanics; and no expense should be spared to do that.

__________________
84 300D, 82 Volvo 244Gl Diesel

I believe that's part of their "spare no wallet" engineering strategy ;->

__________________
"Well, once again, we find that clowns and anarchy don't mix..." - The Tick
'94 E320 ~ Wikel
'87 300SDL ~ Frieda
'87 190E ~ Thurmond III
'84 944 ~ Schrickelgruber
'86 535i ~ Joerg