Interesting...the mileage in my SEC's stays the same but I do see almost 10 RWHP w/ the resistor and a K&N installed (confirmed on a dyno..).

I didn't notice any drop in my wagon, if anything I seemed to be getting slightly better mileage as I don't have to lay into the pedal as hard to move out etc..

Jonathan

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Jonathan Hodgman
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Enthusiast Service, Restoration & Tuning.
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since everyone is obsessed with cheap/free mods to gain power, i understand the rationale behind this, i would just like to reinstate a few factors that have been noted here. i guess it is car-specific, and since everyone's car is maintained differently [and may not be up to peak] the results vary. the following may not apply to everyone's car, but the theory should. i think another reason the results vary between different models is some knock sensors are more sensitive and the initial advance from pulling the resistor may be immediately counteracted by some knock and the ECU pulling timing. i think the resistor is there because americans are idiots (i'm one too) and if someone puts 87 in a benz there has to be some sort of control measure. sure, the knock sensor will pick up what sounds like a popcorn machine, but that may not be enough......

pros:
- better burn of the fuel mixture
- throttle response
- MPG (mixed reviews)
- power/torque gain (marginal at best)

cons:
- hartmut fehyl denies any reason to remove the resistor (i trust this guy)
- dyno results brought back nothing for WOT
- reduced catalytic converter life
- higher coolant temps

on my 92 190E 2.6 auto i noticed the following:
- much better low-end throttle response
- no noticeable top-end power gain
- seemingly less MPG
- transmission shifts harder
- coolant temps higher (cruise & idle)

i plan to pull the resistor when it cools a little.. mostly because i can afford to run a hotter engine then, and the dense air will resist preignition more. is this mod really worth it? depends on your car and your individual results i guess.

i have a 1992 1.8l 180E (W201). Removing the resistor made no noticeable difference on my car, besides less MPG.

But then i guess our fuel is 98 octane here.

Earlier in this thread at READ!!! Free HP for W201 & W124 owners! (Pictures!) I referred to threads that discussed my findings regarding the effects of different values for R16 (including removing it) on my Australian delivered W124 (with M103) and W201 (with M102). It would not surprise me if removing R16 on your Aussie 180E gave a similar result of maximum ignition retard with R16 removed. It appears that for AUS deliveries at least, you need to find the correct value resistor for R16 to give maximum ignition advance. As explained in the threads I refer to, I made use of a multi-position switch with every value for R16 as listed in the workshop manual (equivalent to European delivered models which have a multi-position selector for R16). By using a timing light (with the vacuum line disconnected from the ignition module to simulate high engine load) I was able to determine the best value for R16 and that removing it gave the worst possible result for my cars.

__________________
107.023: 350SLC, 3-speed auto, icon gold, parchment MBtex (sold 2012 after 29 years ownership).
107.026: 500SLC, 4-speed auto, thistle green, green velour.
124.090: 300TE, 4-speed auto, arctic white, cream-beige MBtex.
201.028: 190E 2.3 Sportline, 5-speed manual, arctic white, blue leather.
201.028: 190E 2.3, 4-speed auto, blue-black, grey MBtex.
201.034: 190E 2.3-16, 5-speed manual, blue-black, black leather.

Ok, I figure free hp is the best. Free pot is the best, free food, free gas,free ass, damn just about anything. Not free eye surgury.

On first impression, I would have to say the lowed responce of my 300e has improved. I will see tomorrow if there are any down sides, such as hotter running temps.

I took my lil brother along for a couple test runs. First with the resisitor. then a u-turn, remove the resistor and another hot run. He said he noticed a difference. He does not know anything about cars so I did not bother to explain what we were doing until after. Single blind experiment.

Anyway. I may opt for the manul controller when summer comes back around, but for now, I believe things will be kool.

I started getting Check Engine lights on my 260E with the chip removed and running on premimum.

I plugged it back in and it continues too run fine on mid-grade.

I'm done chipping around.

__________________
John

1995 E320 - 115kmi+ Smoke Silver/Cream (Wife's Wagon)
1989 260E - 195kmi+ Black/Grey (My Panther)
1984 300D - 242kmi+ Black/Palomino (Retired)

does anyone know where the resistor is on a 1991 300ce. ive checked every place listed on the thread but cant find it. a pic would help. thanks

Read you post with much attention to performance you got with your W201. The link you left does not go through, can you post the link again. I have a 1992 W214 sportline not sure if there is any difference in relays for retarding thee ignition. My biggest concern is to pass smog in California every two years. Does this modification allow you to pass smog test or can the irelay be switched out with the old one and put back for smog test.
What is intailed to do the modification?

Thank You
Bob Geco
1992 300-E M103 983 motor

I just purchased a w201 190E 2.6 and drove it home from viriginia...I managed to get roughtly 32 miles to the gallon on the highway....now i read about this resistor before i bought the car and have been following it...i went to remove the resistor in my new 201 and it was already removed. I wonder if that had anything to do with my 32mpg? The fact that the car is lowered also help a lot im sure..

kris

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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

do you need to be running 92 octane or is 91 okay?

around here they only have premium 93..

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

Blindly following the masses.
Just took it out.
Lawsuits to follow.

90 300E 230K

huh ?

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

Runs less................err retarded?

Have a 90' 300ce 24 valve. Spent quite awhile looking for the resistor, could not locate by brake resevour, behind or next to battery, or around or in back of ABS unit. Any other clues would be helpful, would really like to try it out! thanks!