basically, what takes the place of the distributor? what tells the computer to fire and where? i would assume a crank position sensor... does the m104 have one?

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85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project

On a 1993 & later version the crank sensor sends the signal for ignition operation.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

thanks! will go from there.

bw... any idea what signal it sends? square wave something or other?

__________________

85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project

AC voltage (sine wave)

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

thanks for the info! i'll need to convert that signal somehow to make it work with megasquirt.

__________________

85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project

Switch to a trigger wheel on the front. The flywheel trigger (unless you have a very late model m104) only has three 'teeth' and doesn't provide that great of resolution as far as crank location.

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1993 190E 2.6 Sportline

what would you recommend? hall type? so i basically have to mount a trigger wheel at the front? how do i go about doing this?

__________________

85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project

Talk to Pumpish at TurboBandit (Turbobandit.com or mercedes@turbobandit.com)

He does full MS for Mercedes so he can get you trigger wheels and sensor mounts for M10x engines.

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1993 190E 2.6 Sportline

it's in german... does he speak english?

__________________

85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project

Yes, just email him.

And it's swedish

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1993 190E 2.6 Sportline

oh ok swedish... hehe

__________________

85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project

what about the cam sensor... what kind of sensor is it? hall type? what signal does it send out?

__________________

85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project

IIRC it only has one sensor, and that's the TDC sensor. Basically it just tells the computer when it's at #1 TDC and firing.

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1993 190E 2.6 Sportline

I have a 1992 300CE with an M104 and my crank sensor is removed since it was broken and was only a plug-in for a test device. So, my question; How does the ignition module know when to fire? Is it also from a sine wave? And where does it get this sine wave? Maybe the cam sensor?

Just wondering. Thanks!

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1992 300CE - 157kMi (my white beauty)
1992 300CE - 220kMi (sold)
1990 300E - 189kMi (sold)
1990 300SL - 102kMi (salvaged parts available)
1986 300E - 230kMi (salvaged parts available)

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There are some graphs at the bottom of this page;
http://www.startekinfo.com/manual/volumes/e2/1_1/m24.jsp

br,
syljua

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1998 CL500 W140
1984 230E W123