Knowlege base

[Haku]

No. 6 in the series of DIY's of other members that I've PDF'd

[dreamer400sel]

The info is great in this blog. Enjoyed the lessons!:-)

[v12amg]

Any DIY's on Catalytic Converter installation. Thanks

[Merc600sec]

Got some stuff on adaptives for the fuel sys

Mercedes Technical Document
Diagnostic Codes & Self-Adaption
Diagnostic trouble code (DTC) readout:
The engine control module (N3/4) for the LH-SFI, HFM-SFI and ME-SFI systems are equipped with diagnostic
trouble code (DTC) memory. Malfunctions are recognized and stored as trouble codes and are distinguished as
follows:
u Malfunctions which are constantly present,
u Malfunctions which occur longer than a pre determined number of seconds,
u Intermittent contact malfunctions which have occurred 5x during a trip.
The DTC memory remains active even if the vehicle's battery is disconnected.
Malfunctions which are no longer present, are automatically erased again after a maximum of 19 trips.
Under HFM-SFI a TRIP has occurred if:
u Engine running more than 5 minutes
u Vehicle speed >4 km/h (2.5 mph),
u Engine speed >700 rpm,
u Engine shut off for 30 seconds.
Under ME-SFI a TRIP is
u Engine running for more than 20 minutes,
u Engine temperature is greater than -7 degrees C,
u Engine speed is greater than 500 RPM,
The stored diagnostic trouble codes (DTCs) can be read at the 16 (124 E-class) or 38 pin data link connector
(X11/4) with the ignition switched "ON" or with the "engine running".
Diagnosis via an on-off ratio readout has been eliminated in all models.
Mixture Adaptation:
The Lambda control system precisely determines fuel injection duration so that the fuel/air ratio is consistently kept
at Lambda equal 1 (Lambda=1 is 14.7 kg air per 1 kg fuel) under all operating conditions.
Long Term Adaptation (Additive), also called Long Term Fuel Trim (LTF), is calculated while the engine is at idle.
Maximum allowable correction to rich or lean is ± 1.0 msec of the injection duration at idle.
Short Term Adaptation (Multiplicative), also called Short Term Fuel Trim (STF), is calculated while the engine is at
Low Partial Load and at High Partial Load. Maximum allowable correction to rich or lean is ± 32% of the injection
duration at Low or High partial load.
Under ME-SFI the engine control will automatically adapt itself again (ME injection) over the course of 10 TRIPS.
Should a malfunction occur in the form of:
u Intake air leaks
u Injector defects or carbon build-up,
u Air Flow Sensor defects
u Pressure regulator defects, such as a blown diaphragm.
u Fuel tank purge control valve defects or EVAP system leaks.]
u EGR defects
u Vacuum leaks of any kind.
u Mechanical engine wear, such as, chipped valves or leaking rings.
©Baum Tools Unlimited Inc. 1998-99 Tech Support 415-566-9229
The engine control module automatically performs a mixture adjustment. The degree of correction is calculated
constantly and stored in KAM (Keep Alive Memory) RAM. The self-adaptation is performed at idle and under partial
load. Maximum correction towards rich or lean is 25%. After repair work is performed, the engine control module
will automatically adapt itself again after approx. 10 trips. After eliminating a malfunction or after trial installation of
an engine control module from another vehicle, the self-adaptation feature must be reset to its mean value.
"Resetting and Reactivating for BOSCH Engine Control Module Memory"
For LH & HFM systems only.
To reset and reactivate the module :
1. Read and clear all fault codes
2. After display of 1 (No faults present) short the diagnostic plug (pin 8 for 16 pin diagnostic socket, pin
4 for 38 pin diagnostic socket) to ground for 6 to 8 seconds
3. Switch ignition off and wait at least 5 seconds
4. Turn ignition on, wait minimum of 10 seconds then restart engine.
About Stored, Registered and Current Faults
Stored or Permanent Faults - These faults generally turn on the MIL (malfunction indicator lamp previously known
as the Check Engine Light) and are recorded in the permanent memory of the cars system controller. Clearing
these codes most often will extinguish the MIL. (See Registered Faults below.)
Registered or Pending Faults - These faults can keep the MIL on. These faults are recorded in the temporary
memory of the of the cars system controller. This temporary memory records the number of times a component
fails. When a certain number of failures has occurred the fault is moved to permanent storage and the Check
Engine Light (MIL) will be illuminated. On cars equipped with Fault Registers the Check Engine Light may stay on
after the Stored or Permanent Fault has been erased if another occurrence of the fault has happened since the
original Permanent Fault was stored. To ensure the MIL is extinguished, erase the Stored and Registered faults.
Current or Actual Faults - These faults are detected while the car is running at idle or speed. They represent
components currently failing or, in the case of HFM and LH systems, components not present. These codes cannot
be erased, and are only meaningful with the ignition on and the engine running. Codes found in this system with
the KOEO have no meaning. Components not present on the vehicle may be flagged as failing by the cars internal
diagnostics due to the generic nature of the cars software. This is particularly true in C-Class (202) cars.
Check Engine Light (MIL) Diagnosis
Mercedes S(140), SL(129), E(124, 210) and C(202) class have multiple systems which can turn on an Check
Engine Light. All related systems must be tested for codes and repaired before the light will extinguish.
129 LH LH (pin 4 & 5) EA/CC/ISC (pin 7), BM (pin 8), DI (pin 17 & 18) and DM (pin 19)
140 LH LH (pin 4) EA/CC/ISC (pin 7), BM (pin 8), DI (pin 17) and DM (pin 19)
124 HFM HFM (pin 8) EA/CC/ISC (pin 14), and DM (pin 3)
140 HFM HFM (pin 4) EA/CC/ISC (pin 7), BM (pin 8), DI (pin 17) and DM (pin 19)
202 HFM HFM (pin 4) EA/CC/ISC (pin 7) (except C220) and DM (pin 19)
210 HFM HFM (pin 4) EA/CC/ISC (pin 7), BM (pin 8), DI (pin 17) and DM (pin 19)

[Haku]

Another 2 PDF's added!

[vinceching]

are there any diy for rear rotor replacements?

i only found the pdf for the rear brake pad replacement. thanks

[snik]

my experience with replacing the broken little oil pipe that was causing a "clack clack" diesel sound.

removed air cleaner, plastic pieces:



removed coil packs, unscrewed the valve cover bolts, removed the PCV hose, and gently tapped the valve cover with a soft rubber mallet until it was nudged loose



using a sharp, angled pick, I found the culprit ... the one where the end cap was missing



closer inspection revealed no damage to the lifter or cam lobe .. only drove max 50km since the noise started

I started with one cam brace at a time, didn't have to take the brace off ... just loosened enough until the oil pipe could come off, and the new one just popped in under the 2 cam braces,.. torqued to spec. Did them 1 at a time, torqued the brace and moved to the next one.

One thing I found to be odd ... the cam brace was held in place with an 11mm bolt ... normally bolts on this car are either 10, 12, 13, 14, 17 .. it was interesting to find an 11mm bolt

Here is the broken one:



The most challenging one is the one at the end, closest to the cam sprocket ... the brittle plastic tabs make this an unpleasant project. I shoved a whole bunch of rags under the cam sprockets to make sure no plastic tabs would fall off ... I did not manage to take the plastic thing off without breaking every single one of those stupid plastic tabs... 3 lessons learned for me:

1) the plastic piece is held in place by 2 bolts on top
2) the plastic tabs basically hug the chain so you can't remove the plastic guides (shown below) before you unclip them .. 4 on top and 2 on the bottom.
3) the cam braces closest to the cam sprocket each have 4 screws tightening them not 2 like the rest of them

here is the new parts ... part # 119-050-03-16 .. costs $15.49 from dealer (for the right bank), for the left bank, the part # is 02-16

The old part had a plastic seal sitting in the square area (not shown in the pic), but new one didn't come with it .. so I just moved it from the old one to the new one .. it appears this seal mates with the valve cover to provide a better pcv seal. If you are doing it, watch out for this seal.



this is the mating piece .. part # 119-052-09-16 .. costs $10.34 from dealer (left and right use the same part #)



cam sprocket area with the 2 plastic guide pieces removed ..



so now all oil pipes are replaced and the plastic guides are in place:

note the following:

1) the 2 bolts holding the plastic guide
2) the square seal I was referring to earlier in the middle of the plastic guide



so that's pretty much it .. cleaned the valve cover mating surface, installed the new valve cover (right side part # 119-010-24-30 costs: $38.70), installed the new plug seals (x4 comes with the valve cover kit), hand tightened the valve cover in a zigzag manner, air hose back on, coil packs back on, inspected everything, and started it

runs as smooth as silk, with zero clicky clack

overall parts cost: $211.93 to do all oil guides on one side .. didn't do the left side as it's fine and quiet

took me 7 hrs .. I worked very slow and took my sweet time, and labelled all bolts and nuts, cleaned up everything that I took off, etc ... but an expert can probably do it in 1-1.5 hr

2 additional comments:

1) above is not a how to guide, just my experience and I do not take responsibility if you follow it and run into issues

2) Sorry for not taking any obligatory Rolex/Breitling/Patek Philippe watch shots in my post .. I know it's a benzworld forum must do when doing these types of posts ..lol

[MBs600v121998]

How are you (W140) owners,

Since we are in the (W140) forums, and since alot of the owners like to work on thier own cars (Hardly trust any Mechanic), so i decided to explore a very detailed (Photo + Parts No + Name of the part) from my EPC Mercedes Program.

I will follow the same order of the Program i have, if anybody likes the stuff, just ask for you model or even give me your full Chassis number and i will dig for him what he wants.

So lets start Showing.
Relax Guys and watch the Long MOVIE

Note all the information here is for my 1996 S600

My Data
Internal VIN is WDB1400571A291571 9
Sales Designation S600L
Order no. 0 5 219 95298
Delivery date 12 10 1995
Engine no. 120982 12 000709
Transmission 722621 00 003522

So the first thing in my list is the

Note: i will use / for subgroups

Maj. assy M - Engine/
01-ENGINE HOUSING/
005 Design group orientation table (1st picture)
010 Engine (2nd picture)

And the PDF attached is very useful for Beginners

[MBs600v121998]

012 Basic Engine (1st picture)
The parts related to that Picture

[MBs600v121998]

015 Cyllinder crankcase,cover, gasket kit
The Parts related