HELP PLEASE MY 400e in trouble - Mercedes-Benz Forum
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#1 (permalink) Old 11-06-2006, 09:06 PM
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HELP PLEASE MY 400e in trouble

I smell gas in my car whenever i drive. I also having promblems going up hills and my car idles. I was told by my mechanic that i need to replace my fuel filter. does anyone know where my fuel filter is located on my 1993 400e. I would also like to know if this job something i should do myself or trust the professionals. Finally is there anything else i need to replace besides the filter. Thank you
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#2 (permalink) Old 11-06-2006, 11:19 PM
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if it's the same as the 300e....underneath the rear righthand passenger side. I think it has the plastic underbody hiding it.

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#3 (permalink) Old 11-07-2006, 07:10 AM
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Sounds like a rich running condition. Do you see black smoke? Is your exhaust dark with soot?
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#4 (permalink) Old 11-07-2006, 02:10 PM
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Jrousseau,

I did mine a few months ago. Not difficult, just be prepared for a good quantity of fuel. See procedure at website http://mb.braingears.com/ the W124 Chassis section, then select disk 1, then "Maintenance Manual", then see procedure "0780 Replacing Fuel Filter". Battlecat was correct, it's under a plastic panel on passengers side.

I also suggest you purchase the shop manual on CD which is what you'll see on mb.braingears - if only because access online can sometimes be troublesome. (Kudos however to mb.braingears for existing!) I got it on Ebay.

Best of Luck, Scotz
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#5 (permalink) Old 11-07-2006, 03:50 PM
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My 400E had a similar gas odor problem, it turns out that the flexline from the fuel tank to the fuel filter had started to weep. If you are going to change your filter, change the flexline too, it is messy though(ie. don't do it on a full tank 0


Also check the Cap and rotors, those tend to go bad and never get replaced on the 400E's...

::Familie von Mercedes::
'00 German Sheperd ("Hans")
'89 300 TE 117k
'92 400E (killed in action)
'68 280 SE/8 (High School Sweetheart)
'95 E320 (mother's)
'60 190D (dad's new project)
'05 A6 Allroad 2.7t (dad's ride)
'84 190E (sold)
'90 300CE (brother's)
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#6 (permalink) Old 11-08-2006, 12:56 PM
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Im young and with an expensive car. But im really glad to have you guys around. Thanks for all the feed back and friday mornig im going to get sarted. Before i get started what the hell is a flex line and cap and rotors. Thanks Again
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#7 (permalink) Old 11-08-2006, 01:54 PM
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Originally Posted by ScotzBenz
Jrousseau,

I did mine a few months ago. Not difficult, just be prepared for a good quantity of fuel. See procedure at website http://mb.braingears.com/ the W124 Chassis section, then select disk 1, then "Maintenance Manual", then see procedure "0780 Replacing Fuel Filter". Battlecat was correct, it's under a plastic panel on passengers side.

I also suggest you purchase the shop manual on CD which is what you'll see on mb.braingears - if only because access online can sometimes be troublesome. (Kudos however to mb.braingears for existing!) I got it on Ebay.

Best of Luck, Scotz
Scotz, thx for directing to braingears site. From there, I wasn't able to get to Maintenance item 8252 "Windshield and headlamp wiper/washer inspection". It seems only certain items are available. Is this by design? I was looking to diagnose my wipers on the '93 300E 2.8 which quit working altogether and it is raining.

I came across a CD on Ebay for $5.95 "Mercedes Repair 124 Manual 86 - 95 260E 300E E320 400E" plus $5.99 shipping from Canada ... is this what you are referring to?
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#8 (permalink) Old 11-10-2006, 06:19 PM
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Sorry for the delay...Seller I purchased from was "fastmanuals", about US$12 shipped. Felt I could hardly lose at that price and was fine. Scott
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#9 (permalink) Old 11-11-2006, 01:49 AM
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300CE 24v with petrol (gas) smell

For what it's worth, I had fuel smell and starting problems, particularly in hot weather.

Traced smell to leak from EHA (bolted to fuel distributor). Assumed that plastic washers were at fault and changed them - no go - fuel still weeping from around EHA.

Luckily I had a spare EHA (same part number etc.) from faulty 300TE 4Matic (different distributor) so installed that. NO CHANGE - still weeping.

I then found that the new 300TE distributor - removed EHA and installed that. BINGO - no leak and perfect starting.

I then had an idling problem so removed ICV (Idle Control Valve). Cleaned it up and lubricated it with WD40, together with the ICV from the 300TE (same part number, again). Replaced original 300CE 24v ICV - WOULD NOT IDLE AT ALL!!!

Recovered cleaned up 300TE ICV and installed that. Now all is well:

It starts perfectly from cold.

It starts perfectly from hot

It idles like a dream.

I hope these experiences are of use to someone, although the 400E that started this may be different.

All the best.

RayH
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#10 (permalink) Old 11-11-2006, 01:38 PM
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Thumbs up

cheers! Always feels good to fix it yourself and have it run like a dream!

::Familie von Mercedes::
'00 German Sheperd ("Hans")
'89 300 TE 117k
'92 400E (killed in action)
'68 280 SE/8 (High School Sweetheart)
'95 E320 (mother's)
'60 190D (dad's new project)
'05 A6 Allroad 2.7t (dad's ride)
'84 190E (sold)
'90 300CE (brother's)
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