E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

Timing resistor

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Old Dec 19, 2006 | 06:08 PM
  #26  
crr1612's Avatar
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From: marlboro, nj
Mercedes benz 1991 300ce(RIP), now an 89 300ce
bjay, where is it located on the 89? i knew where it was on my 91, but havent checked on my 89, so i dont know if its in the same spot. thanks
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Old Dec 19, 2006 | 06:14 PM
  #27  
Kestas's Avatar
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From: Motor City
95 E320 Cabriolet, 108K
Originally Posted by bjay51d
Numbers dont lie...Im over 20miles over what I usually wouldve had in just a half tank.THe resistor is history!
That's borderline placebo. Numbers don't lie, but the fuel gauge is notoriously inaccurate. The only true measure of gas mileage is an average over three fillups, not "I drove ___ miles until the gauge read half full with a __ capacity tank." An average over three fillups are the only numbers I will recognize.
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Old Dec 19, 2006 | 08:20 PM
  #28  
AMGDave's Avatar
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From: Boise, ID, USA
300D, 500E, E420
Originally Posted by Kestas
That's borderline placebo. Numbers don't lie, but the fuel gauge is notoriously inaccurate. The only true measure of gas mileage is an average over three fillups, not "I drove ___ miles until the gauge read half full with a __ capacity tank." An average over three fillups are the only numbers I will recognize.
I track every fillup in an Excel spreadsheet along with all my service & maintenance records (yeah, I'm ****). I went 2-3 full tanks. My MPG dropped from roughly 22 down to 20 or a bit less with the resistor pulled, and returned to the normal 22 with it reinstalled. This was on a 1986 300E, YMMV, but my car was happier with it in place...

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Old Dec 19, 2006 | 08:23 PM
  #29  
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From: New Jersey
1989300CE(sold),1996Accord,02CBR954
Originally Posted by crr1612
bjay, where is it located on the 89? i knew where it was on my 91, but havent checked on my 89, so i dont know if its in the same spot. thanks
mine was actually sitting right under the brake fluid resivoir.I think its usually tieds to the ac hose.Mine was not, it was just sitting there.
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Old Dec 19, 2006 | 08:37 PM
  #30  
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From: New Jersey
1989300CE(sold),1996Accord,02CBR954
Originally Posted by Kestas
That's borderline placebo. Numbers don't lie, but the fuel gauge is notoriously inaccurate. The only true measure of gas mileage is an average over three fillups, not "I drove ___ miles until the gauge read half full with a __ capacity tank." An average over three fillups are the only numbers I will recognize.
Oh, excuse me...Even if its a placebo effect.Let me relish in my newly found performance enhancement..party poopers
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Old Dec 20, 2006 | 09:31 AM
  #31  
Kestas's Avatar
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From: Motor City
95 E320 Cabriolet, 108K
According to the time stamps, you had 30 minutes of glory.
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Old Dec 21, 2006 | 03:10 AM
  #32  
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89 300TE, and 68 280sel
I tell you what. Take that resistor out, pop in some 108 octance boost and you have what some call a quick car. I love it.
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Old Dec 21, 2006 | 12:10 PM
  #33  
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Quite a few:)
On the dyno w/ the 560's I've seen as much as 8hp over out baseline up to 2500RPM w/ said resistor pulled. Hell Mercedes flat out says that the stock US resistor causes 'decreased performance and economy'.

Now I do recommend that ya'll check your timing as you may be over advancing on some engines w/ the resistor pulled while others come right into spec.
Here is what I have for timing maps and their resistance:
0 - 145 ohms ~4atdc
150 - 330 ~0 tdc
350 - 675 ~4btdc
680 - 3.0k ~10btdc
3.2k - 0pen ~15btdc

This was off of a 420SEL which should translate to and CIS E car.

The 12 degrees is where the Euro's come set, and that's the theoretical ideal thus it's where I shoot for.

If y'all don't think going from 2-3 degrees initial to 10-12 makes a difference get into an older points car and retard and advance it accordingly...You'll notice the difference straight away.

Jonathan
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Old Dec 21, 2006 | 12:50 PM
  #34  
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1990 300ce
ha ha, this is all so confusing to me. Luckily, if Matt is correct, my M104 doesn't have this part... So there's no point for me to dwell on it. lol
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Old Dec 21, 2006 | 12:57 PM
  #35  
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From: New Jersey
1989300CE(sold),1996Accord,02CBR954
Originally Posted by Bigpete123
ha ha, this is all so confusing to me. Luckily, if Matt is correct, my M104 doesn't have this part... So there's no point for me to dwell on it. lol
crr1612 said he had one on his 91ce
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Old Dec 21, 2006 | 01:03 PM
  #36  
Kestas's Avatar
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From: Motor City
95 E320 Cabriolet, 108K
Perhaps it would make sense for the enthusiast to wire in a pot (variable resistor). Then you can dial in whatever base timing you want in seconds.
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Old Dec 21, 2006 | 09:37 PM
  #37  
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From: marlboro, nj
Mercedes benz 1991 300ce(RIP), now an 89 300ce
yeah, but u better mark on the pot at what point the resistances are.
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Old Dec 21, 2006 | 10:53 PM
  #38  
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89 300TE, and 68 280sel
Originally Posted by jhodg5kc
On the dyno w/ the 560's I've seen as much as 8hp over out baseline up to 2500RPM w/ said resistor pulled. Hell Mercedes flat out says that the stock US resistor causes 'decreased performance and economy'.

Now I do recommend that ya'll check your timing as you may be over advancing on some engines w/ the resistor pulled while others come right into spec.
Here is what I have for timing maps and their resistance:
0 - 145 ohms ~4atdc
150 - 330 ~0 tdc
350 - 675 ~4btdc
680 - 3.0k ~10btdc
3.2k - 0pen ~15btdc

This was off of a 420SEL which should translate to and CIS E car.

The 12 degrees is where the Euro's come set, and that's the theoretical ideal thus it's where I shoot for.

If y'all don't think going from 2-3 degrees initial to 10-12 makes a difference get into an older points car and retard and advance it accordingly...You'll notice the difference straight away.

Jonathan

Love the info. So when you say open is almost 15btdc is that w/out the resistor? I am running high octane and have no pings, i'll check the timing tomorrow. But I could always run to radio shack and get a resistor and solder it in there and check for a varying in perf. "over advancing"? 15btdc is pretty advanced if you ask me. clarify please?!
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Old Dec 22, 2006 | 10:10 AM
  #39  
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Originally Posted by myfirstbenz
Love the info. So when you say open is almost 15btdc is that w/out the resistor? I am running high octane and have no pings, i'll check the timing tomorrow. But I could always run to radio shack and get a resistor and solder it in there and check for a varying in perf. "over advancing"? 15btdc is pretty advanced if you ask me. clarify please?!
MB sells about 4 different resistors with the different ohm ratings. No need to rig your car like that.
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