DIY ASR Defeat Switch - PeachParts Mercedes-Benz Forum

Eivind Soltvedt · #1 03-04-2005, 03:08 PM

124 series with M103 and M104 engines has ASR 2 while the V8 has ASR 3.

My car (90-300TE) has 2 control units that are involved when the accelerator is "strangeled" when ASR kicks in.

The N30 box (ASR/ABS) and the N4/1 box (electronic accelerator)
Because M103/M104 has a electronic accelerator they have an actuator to adjust the throttle, and to cut throttle when ASR kicks in.

I have a theory when it comes to ASR defeat on the 6 cyl. and I want your oppinion:

The N30 and N4/1 box communicates over 2 wires.
On the N4/1 box the pins used to this are 31 and 34.

31: To ABS/ASR control unit - Throttle valve actual value
34: From ABS/ASR control unit - throttle valve setpoint.

If I connect these over a switch, I believe ASR would be switched off.
And the ABS and Tempomat should still work!?

According to what I've read in WIS there is no storage of fault messages in the ASR 2 systems.

ke6dcj · #2 03-04-2005, 03:26 PM

Seems to make sense to me.

Go for it!

:-) neil

PS: I'm glad my C36 powered wagon does NOT have ASR!

aldedmon · #3 03-27-2005, 09:03 AM

Okay. I got the switch installed but have questions.
I used Bryan Harter Picture / step s and it does work. WOW all the way through first and into 2nd boy does it ever.
But the ASR switch does not turn off my ASR ligt nor the snow chains.
It also seems to work backwards. I mean the car defaults to ASR OFF when I start it and then I turn the ASR ON by presing the switch. Can someone please let me know where I went wrong. Michaels and Bryans instructions are different as far as which wire colors are connected to 25 , 35 , 37.
Please Help!! wWith this thing defulting to NO ASR, I wont have tires left on this BEAST for very long

gsxr · #4 03-27-2005, 11:16 AM

On my ASR defeat setup, when you flip the switch, it turns ON the snow chain light,the ABS light, and the ASR triangle in the speedo. At least it used to... the triangle no longer is on when ASR is defeated, but it flickers once when I turn it off (re-engaging ASR)! Go figure. Everything works as normal though so I'm not complaining.

My car came with the ASR defeat setup so I can't help on the wiring questions... sorry!

aldedmon · #5 03-27-2005, 10:24 PM

Okay, Thanks, Never Mind.
I got in touch with Bryan Harter and went back and did some trouble shooting. FINALLY got it all sorted out and now it works properly.
All I can say is HOLY $#!T. NOW THAT'S WHAT I'M TAWKIN BOUT!

Michael · #6 03-29-2005, 12:07 PM

If there's something I should add to the installation instructions in the interest of clarity, I'm open to suggestions.

Chris W. · #7 03-31-2005, 10:00 PM

Michael, I was one of your early purchasers. I have not installed the switch yet, however, and I have managed to lose whatever instructions you had included.

Can you email them to me?

Rgds,
Chris W.
'93 500E

Eivind Soltvedt · #8 04-06-2005, 03:08 PM

Quote:

Originally Posted by Eivind Soltvedt

124 series with M103 and M104 engines has ASR 2 while the V8 has ASR 3.

My car (90-300TE) has 2 control units that are involved when the accelerator is "strangeled" when ASR kicks in.

The N30 box (ASR/ABS) and the N4/1 box (electronic accelerator)
Because M103/M104 has a electronic accelerator they have an actuator to adjust the throttle, and to cut throttle when ASR kicks in.

I have a theory when it comes to ASR defeat on the 6 cyl. and I want your oppinion:

The N30 and N4/1 box communicates over 2 wires.
On the N4/1 box the pins used to this are 31 and 34.

31: To ABS/ASR control unit - Throttle valve actual value
34: From ABS/ASR control unit - throttle valve setpoint.

If I connect these over a switch, I believe ASR would be switched off.
And the ABS and Tempomat should still work!?

According to what I've read in WIS there is no storage of fault messages in the ASR 2 systems.

And it works! Been testet out now, and my family-wagon has become more a driving machine than before!

Mighty fun! To bad all the snow and ice has gone!

Michael · #9 04-14-2005, 10:24 AM

Back by popular demand, I have once again gathered all the goodies to make another run of kits. I have the parts for 5 more kits, first come first served. Price is $250, which includes shipping via USPS Priority Mail within the U.S. If you are outside the U.S., the cost is $240 U.S. + actual shipping cost.

rainmaker · #10 04-29-2005, 10:36 AM

I've been getting a lot of PMs lately about my pics of the RENNTech ASR Defeat switch. Apparently, Imagestation does not allow outside linking anymore.

Anyway, here they are again.

Pics of the RENNTech kit:

Pics of the installation instructions (color codes and/or numbers may not match. Make sure you know what you are doing):

Here's a diagram I made on how it all comes together:

Knock yourselves out!