Does this look like a fuel filter? - PeachParts Mercedes-Benz Forum

detitus74 · #1 03-30-2007, 07:12 PM

This is a picture from a 1990 350SDL. MY question is, is this the primary fuel filter or something else.

85 DSEL · #2 03-30-2007, 07:18 PM

Sure looks like a primary filter to me! But hey, what do I know?!

muleears · #3 03-30-2007, 07:41 PM

Thats what I call a primary fuel filter, the other, the big spin on looking one, is the secondary.

Why do you ask?

loneranger · #4 03-30-2007, 08:12 PM

yes, that is the primary filter

kbenjamin0106 · #5 03-30-2007, 08:21 PM

Sure is one, atleast you can see yours, mine is so dirty its black and i have a new one but im afriad if i change it the lines may get bad since its origanal

detitus74 · #6 03-30-2007, 10:40 PM

I meant to ask also how would i know if this is the original filter or a replacement one. Thanks, Derek

TheDon · #7 03-30-2007, 10:46 PM

thats not the same kind I got from worldpac...

#8 03-30-2007, 10:48 PM

Quote:

Originally Posted by detitus74

I meant to ask also how would i know if this is the original filter or a replacement one. Thanks, Derek

I would be pretty surprised if it was original, mine tend to become clogged every 20-40K miles or so. The replacement looks like this:

http://catalog.worldpac.com/mercedesshop/sophio/quote.jsp?clientid=catalog.mercedesshop&cookieid=1CQ0J3JZ421U1CRIR5&baseurl=http://catalog.peachparts.com/&partner=mercedesshop&year=1990&product=E1000-97870&application=000046827

I like the clear type, you can see when they start to become dirty.

pawoSD · #9 03-31-2007, 01:52 AM

I went and got a couple pre-filters from the dealer last week because I didn't want to pay shipping on a $2.70 item...and whattya know, the dealer had "OEM MB" ones on hand, for: $2.80 looks like the dealer won that time

Anyways, they are white, have a MB part # and star emblem on them, and smaller than the ones from Bosch/worldpac. Fuel seems to flow through them and become filtered during the flowing through....so I am guessing it works the same.

I admit the clear ones are nice to see when they're dirty....but I've never had a problem with one being clogged, and I run my filters (primary and secondary) about 25-30k between changes...and the prefilter is usually barely dirty.

truckinik · #10 03-31-2007, 03:26 AM

I've got the same set-up in my cars, All of my 300CD's have the same filter, in the same location as that. I didn't know that is the 'Primary' filter, I thought it was the "Secondary' filter, even though it is the first filter the fuel passes through. I always thought, the bigger, screw on filter, is the primary.
Still learning these cars, all of this stuff is a little new to me still.

85 DSEL · #11 03-31-2007, 08:45 AM

Quote:

Originally Posted by truckinik;

I didn't know that is the 'Primary' filter, I thought it was the "Secondary' filter, even though it is the first filter the fuel passes through. I always thought, the bigger, screw on filter, is the primary.
Still learning these cars, all of this stuff is a little new to me still.

Yup! That's what I used to think too...until I thought about it!

mespe · #12 03-31-2007, 08:52 AM

You mean that's not the fuel expanding venturi used to improve fuel efficiency?

#13 03-31-2007, 09:31 AM

Quote:

Originally Posted by pawoSD

I went and got a couple pre-filters from the dealer last week because I didn't want to pay shipping on a $2.70 item...and whattya know, the dealer had "OEM MB" ones on hand, for: $2.80 looks like the dealer won that time

Anyways, they are white, have a MB part # and star emblem on them, and smaller than the ones from Bosch/worldpac. Fuel seems to flow through them and become filtered during the flowing through....so I am guessing it works the same.

I admit the clear ones are nice to see when they're dirty....but I've never had a problem with one being clogged, and I run my filters (primary and secondary) about 25-30k between changes...and the prefilter is usually barely dirty.

My dealer only has the white ones,so I always order a few from Phil when I buy something else. If you change them at 20-30K, you probably won't have a problem unless you get some dirty fuel.