[nubyOz]

Replacing EZL, howto?

Hi,

Update: got the EZL, now need to know what to watch out for:
Just got the EZL 013 545 64 32 with trimmer plug (R16/2 resistor) 015 545 67 28, (fixed to 2.4 KOhms) from Eddie (thanks Eddie, great service as usual).
tried out today, seems ok running at idle.

Two Questions arise:
1. The EZL has white stuff on the back, assume it is cooling/contact paste, similar to CPU Cooler, in that case I would get some computer stuff.

2, The R16/2 is fixed, not variable, does anyone know the right resistance values for high octance, otherwise I wil try as my current EZL without resistor is properly even less optimal than the new one.

>>>>>> Original posting left here for reference>>>>>>>>>>>>
Need a R16/2.
See http://www.benzworld.org/forums/w140-s-class/1434180-exploring-power-r16-2-please-help.html for what it is used for.

It is attached to the Distributor Ignition N1/3 or AZL K6JRF Auto Page.
The AZL/DI is under the hood, left side, on my Right Hand Drive at least.

The attached pics give you an idea where the R16/2 is located on the AZL, first picture circles where the R16/2 should be, see other pic as reference.

Anybody got an old Distributor Ignition with a spare R16/2 or at least can tell me the part number for the R16/2?
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Cheers

nuby

 

[syljua]

I'm the only one with access to these pages?;
Êàòàëîã

The trim plug should be 8. Lots of notes on that page. Since you're in Australia,
I think you should get the one marked with RA, 0155456828,
and it should be about US $20.

br,
syljua

 

[syljua]

Hmm,

By looking more at you images, I read the number, or at least the last 4 numbers,
on your Ignition Control Box. In EPC, they have the number pattern of
0??54??32. The latter ones, before introduction of ME1.0, got 015 at the start.
The last two ??, signals the revision or version number.

Now, I cannot find a part with ending 45 32 on any of the control boxes for
M119.970 (500). I did a quick search for 015454532, and found it to be a
control module for M119.971 (420)!

My point is, since that trim knob is for indicating the quality, or knock rating, of
the filled fuel, I think that using a control box, related to a different engine
with a different compression ratio, where knock resistance comes into play, would
be wrong.

Now, I'm not completely sure if this box actually controls the timing, but
since the trim knob is there, I would think so. And since its missing on yours,
I guess that the previous owner got the M119.971 part installed, but
removed the knob to avoid or fix ignition problems?

Perhaps you should be on the safe side, and locate a module for you car?
Could you please give the VIN here, and I will try to find the correct number?

br,
syljua

 

[nubyOz]

Hi Syljua,

Great pickup, confirmed my EZL is part no 014 545 45 32.
99.75% sure it is a 5ltr engine.
Can you advise if this is correct, I will PM you my VIN.

Cheers

nubyOz

 

[syljua]

Rgds, changing the R16/2, I cannot believe the Mercedes sells car that
can be tuned by a knob... To correct for other non-standard changes made
to the car (like removing the CAT), yes, but not for car delivered to
areas with good quality fuels.

Moving a car from Africa to other countries, could perhaps benefit from
such "tuning", but for all other, leave it alone!

br,
syljua

 

[syljua]

Great pickup, confirmed my EZL is part no 014 545 45 32.
99.75% sure it is a 5ltr engine.
Can you advise if this is correct, I will PM you my VIN.

From you VIN, I can see that you should have a M119.970 engine,
with option 625 for AUS.

The 0145454532 that you have is a EZL for the M119.971, the 4.2 ltr variety,
for the same time frame that your car is from (roughly between A100000 and A136000);
Êàòàëîã

If we then look at the save parts drawing for your car, the M119.970,
we get for the same range (A100000 to A136000) that you car fits in;
Êàòàëîã
the EZL; A0145454332 originally fitted, which is replaced by 0155456132, or
A0145454232 originally fitted, which is replaced by A0155456232.
A0155456232 and A015456132 is then also equal.

So, you have 4 different EZL for your car;
A014544232
A014544332
A015546132
A015546232

One could think that they, the 420 and 500, would not be that different, but since the ignition
maps is stored in this module, I think it will make all the difference.
Perhaps thats why the knob is removed.

I would, get one of the EZL I list above. I see that they are very! expensive,
but getting one from a junkyard should be possible;
http://www.benzworld.org/forums/r129-sl-class/1350145-ezl-my90-98-r129-sl500sl-3.html

You share these EZL with engines sitting in other chassis from the same timeframe, like
the R129 500SL with the 119.97? engine (LH-variety);
Êàòàëîã
and
W124 500E with the M119.974 engine;
Êàòàëîã

Then, if you get hold on one of those, if faulty, they can be rebuild here;
EZL - Ignition Control Modules

Anyway, if your car is functioning ok, I would leave it alone...

br,
syljua

 

[syljua]

BTW, are you sure that your engine is the original one?
Have a look at the engine serial number, I think
it is stamped on the block under the front cover (between the
two banks), and for the original one, it should read;
119970 22 030074

br,
syljua

 

[Clarkz71]

I looked up that vehicle on my EPC, that EZL is for a 400SEL/S420
with a M119.971 or M119.981

 

[syljua]

I looked up that vehicle on my EPC, that EZL is for a 400SEL/S420
with a M119.971 or M119.981

Nearly true, the M119.981 does not have a EZL at all. The ignition is instead
controlled by the ME1.0 control module. That one of the differences between
a LH-SFI (the M119.971 and M119.970) and the newer ME-SFI (the M119.981
and M119.980).

The default RON fuel quality setting on ME-SFI, is set by HHT or Star Diagnostic computer.
The ME-SFI even does automatic RON switching during one run if it detects a
persistent high knocking tendency.

I learn all this from reading in WIS.

br,
syljua

 

[Clarkz71]

Didn't look in WIS, though I have it on my computer as well.

I looked up a 400SEL/S420 to find the part # for the EZL.

It list's M119.971 & M119.981 for that chassis, though not all parts apply to both.

I'm well aware that 1996 and up W140's have ME since I worked
at the MB dealer from 1982 to 1999. .:thumbsup:

______________________________

1994 E420

Mercedes Benz Technician since 1982

 

[syljua]

It list's M119.971 & M119.981 for that chassis, though not all parts apply to both.

Yes, but my point was, that nubyOz should not go hunting for EZL in >96 500
cars.

br,
syljua

 

[syljua]

nubyOz asks in a PM, if the 013 545 64 32 can be used?

Well according to the part drawing;
Êàòàëîã
that numbers was fitted to slightly earlier engines, but is replaced with
the 015546132. So, its for a 5ltr. but I do not know if earlier units can
be used on later ones (forwards compatible), even if both resolves to the same replacement part number today (which is then backwards compatible)?

Anybody knows?

br,
syljua

 

[Clarkz71]

When the EPC say's "replaced by" it's usually an updated part #.
Or "superceeded by". Sometimes because of an improvement.

In any case it should work.

 

[syljua]

When the EPC say's "replaced by" it's usually an updated part #.
Or "superceeded by". Sometimes because of an improvement.

In any case it should work.

Are you completely sure about that?
In this case, its about using a part never fitted to that engine.

Like this;
Engine A is fitted with EZL A, and later engine B is fitted with EZL B.
Both EZL A and B is replaced by EZL C.

Now, can the EZL A be fitted to engine B?, or
did the change from A to B matter?

br,
syljua

 

[Clarkz71]

nubyOz asks in a PM, if the 013 545 64 32 can be used?
that numbers was fitted to slightly earlier engines, but is replaced with
the 015546132. So, its for a 5ltr. but I do not know if earlier units can


Anybody knows?

br,
syljua

Going by your post as far as "replaced by"


Look at the print out from MB EPC. All EZL pert #'s superceed to
015-545-6132. As I said it's an updated part #.

 

[Clarkz71]

I'd say "very SURE"

 

[syljua]

Yes, yes, we do NOT disagree on that!

Saying that part C can replace both A and B, does not strictly mean
that A also can replace B...

If it was the part C (6132 or 6232) he got hold of, yes that would work as written in
EPC, but in this case, its the 013 545 6432, fitting part A where B or C is expected.

Therefore, I think there's a possibility that it will not work...

br,
syljua

 

[Clarkz71]

It will work, so I disagree with you. As a Mercedes technician I have tried it before.
Superceeded parts (C) will interchange with the originals (A/B)

______________________________

1994 E420

Mercedes Technician since 1982

 

[syljua]

It will work, so I disagree with you. As a Mercedes technician I have tried it before.
Superceeded parts (C) will interchange with the originals (A/B)

So you have put older engine parts (A) on engines expecting later part (B)?

I'm not doubting your Mercedes experience here, but do you see my logical
explanation? And why there can be a possibility that it will not work?

Fact; A is replaced by C, because C can act as A.
Fact; B is replaced by C, because C can act as B.
But; That does not imply that A can act as B, nor that B can act as A. See?

I have looked up in ETM for both 92, where part A is from;

and B, 92-96;

and yes, they have the same connecting pins/signals.
But even if C can understand and deliver signals for both A and B, does
not imply that A can understand and deliver B signals.

[strange analogy following ]
Lets say CIA wanted a translator before 1990 (A) to translate what its enemies say,
they would get a translator speaking Russian. Now some years later, 1990-2000, Russian
threat is gone, and now they get a translator speaking Chinese (B). He/she is then replaced
by a person speaking both Russian and Chinese in 2000 (C).
Now, the bilingual person quits, and they need to get a person to translate some
Chinese documents from the 90s. They could hire another bilingual one (C) or a Chinese (B)
speaking, but a Russian one (A) would be not much use.
[strange analogy done. No offense Russian nor Chinese, or CIA...]

br,
syljua

 

[Clarkz71]

It's nothing to do with older engines. Mercedes changes the part #'s for a lot of reasons.

Even a supplier change will have a different # although the part is the same, or if a later model uses the same part they may change the #.



Let me try and make it simple for you.

Say I have a 1993 500SEL (A) and a 1995 S500 (B). Both LH systems.

They both update to EZL C. That means EZL A + B operate
same as C otherwise C could not replace them both.


Of course I've only been doing this (Mercedes repair) for 27 years so what do I know.

__________________________________