ASR issues

1979-1991 280SE, 300SE, 300SEL, 380SE, 380SEL, 380SEC, 420SE, 420SEL, 420SEC, 500SE, 500SEL, 500SEC, 560SEL, 560SEC
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ngruzevs
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ASR issues

Post by ngruzevs » Wed 18 Apr, 2018 8:25 pm

Chaps

My ASR warning light on my 420 seems to be coming on more frequently than it did in the past. Over the past couple of years it may have come on one a month, but now it seems to be more frequently, almost on a daily basis. Once it's on the only way to reset the ASR system is to restart engine.
I'm trying to understand when it comes on, today it seemed to come on when I went over tram lines on Elizabeth Street. I'm not sure where to start looking at this one. I'm guessing it's not a common option on Australian delivered W126's.

Additionally does an ASR diff require different diff oil to a non ASR diff?
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John Green
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Re: ASR issues

Post by John Green » Thu 19 Apr, 2018 1:07 pm

Nick, you should be able to pull a fault code from the 16 pin terminal block in front of the brake booster? From memory the ARS/ABS system have a combined code system.

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ngruzevs
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Re: ASR issues

Post by ngruzevs » Fri 20 Apr, 2018 8:10 am

Thanks John

Didn't even realise I had this socket, but looks like an 8 pin rather than the 16. Time to invest in a blinking reader

Will also be replacing fuses with new copper brass fuses.

Found diff oil spec, it's listed in the user manual (sheet 235.3) https://bevo.mercedes-benz.com/bevolisten/235.3_en.html
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1971 MK2 Jensen Interceptor Regency Red Jeremy
1979 W116 450SE Brilliant Red Metallic Claudia
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Ivanerrol
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Re: ASR issues

Post by Ivanerrol » Fri 20 Apr, 2018 8:19 pm

In the W140.
The ASR and ABS systems are linked.

I had a lot of issues with the ASR in my W140 and it turned out to be dirty ABS sensors.

The boys down the stealership were scratching their collective heads for weeks before they found the issue.
W211 - E240
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W124 - 300e, 260e (ex Japan)
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ngruzevs
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Re: ASR issues

Post by ngruzevs » Fri 20 Apr, 2018 9:47 pm

It's a W126 420SE. It's quite annoying as when ASR warning light triggers, accelerator goes doughy.

Cleaning ABS sensors sounds like a good start, when I cleaned my sensors on 280SE, they were terribly dirty.
Current Garage
1971 MK2 Jensen Interceptor Regency Red Jeremy
1979 W116 450SE Brilliant Red Metallic Claudia
1985 W126 280SE Thistle Green Max
1987 W126 300SE (SA Delivered) Pearl Grey Matt Oscar
2018 Hyundai i30N Polar White Penelope

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Re: ASR issues

Post by Ivanerrol » Sat 21 Apr, 2018 9:03 pm

Last of the w126's and the first of the w140's would have shared technology.
The code system wouldn't have moved on that much. Oz W140's having OBD minus point 05.

Pretty common. The last of the W202's were almost mechanically W203's with a W202 body. Same with the last of the W210's. and the last of the W211's

The moral of the story. if you want a particular Benz Model, buy the very last of the model run
W211 - E240
W204 - C280
Departed
W202 - C200, C180, C180
W126 - 380SE , 380SE (Ex SA Import), 560SEL
W124 - 300e, 260e (ex Japan)
W111 220s (Indonesia) 4 speed manual column shift
W123 230
W116 450SEL
W140 420SEL
W210 E240, E240
W209 CLK 240
W201 190e 2.6 (ex U.K.)

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Ivanerrol
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Re: ASR issues

Post by Ivanerrol » Sat 21 Apr, 2018 9:07 pm

Just another spanner in the works.
The brake light switch caused all sorts of issues not actually related to the lights them selves.

Brake light switch had two contacts - one went off to activate the brake lights, the other sent a signal to the ECU and the ABS system. The ABS and ASR are interlinked.
W211 - E240
W204 - C280
Departed
W202 - C200, C180, C180
W126 - 380SE , 380SE (Ex SA Import), 560SEL
W124 - 300e, 260e (ex Japan)
W111 220s (Indonesia) 4 speed manual column shift
W123 230
W116 450SEL
W140 420SEL
W210 E240, E240
W209 CLK 240
W201 190e 2.6 (ex U.K.)

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ngruzevs
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Re: ASR issues

Post by ngruzevs » Sun 22 Apr, 2018 8:36 am

ASR was introduced in 09/1986 as an option. I'm guessing this was considered near the end of the W126 model run as the W140 was initially due for release in 1988. Mercedes then introduced the yellow warning symbol within speedometer 09/1989 (ASR2). Interestingly ASR became an option of 6 cylinder cars at the same time (ASR2).

Well didn't get around to cleaning ABS sensors, as I spent most of yesterday working on electrical issues on my Jensen.
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carina
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Re: ASR issues

Post by carina » Thu 21 Jun, 2018 8:33 am

I’ve been through this problem and for me it was the cruise control servo ( top of engine and linked to the throttle linkage) in which the grease had dried somewhat. After removal and carefull opening I re greased the cogs with a lithium grease . No problems since. I did a write up on Benzworld and Ozbenz of the job.
1991 420se . "Flosshilde".
1982 500SEC "Goldie" .Soon to be Black.
1955 220a Ponton, 'Polly' still getting over the fact I now have a Merc that is 3 years younger than me.

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ngruzevs
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Re: ASR issues

Post by ngruzevs » Sun 24 Jun, 2018 7:26 am

Interestingly my linkages got stuck soon after I had the intermittent ASR issues. Since cleaning all linkages I've only had the warning light come on once.

I highly recommend being proactive and cleaning linkages regularly.
Current Garage
1971 MK2 Jensen Interceptor Regency Red Jeremy
1979 W116 450SE Brilliant Red Metallic Claudia
1985 W126 280SE Thistle Green Max
1987 W126 300SE (SA Delivered) Pearl Grey Matt Oscar
2018 Hyundai i30N Polar White Penelope

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Astro-Benz777
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Re: ASR issues

Post by Astro-Benz777 » Tue 26 Jun, 2018 7:35 pm

carina wrote:
Thu 21 Jun, 2018 8:33 am
I’ve been through this problem and for me it was the cruise control servo ( top of engine and linked to the throttle linkage) in which the grease had dried somewhat. After removal and carefull opening I re greased the cogs with a lithium grease . No problems since. I did a write up on Benzworld and Ozbenz of the job.
Out of interest, have you got a picture of this part (Tempomat Servo)?
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hents99
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Re: ASR issues

Post by hents99 » Mon 09 Jul, 2018 4:20 pm

This is like throttle position sensor.
This is for “reading movement/resistance” and tempomat actuator pushing throttle linkage.

Turn ignition on don’t start engine.
Disconnect linkage between throttle and so called potentiometer and try to move pedal side.
Now tempomat actuator must move throttle.
If it’s not moving smoothly the you may have problems with potentiometer.
Also might be linkage problem if it stuck. Adjusting may help.

Usually abs light will be on earlier than asr light when voltage drops but never know. Might be also caused by too high voltage but usually sensor is worn.
Last edited by hents99 on Mon 09 Jul, 2018 5:51 pm, edited 1 time in total.
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Re: ASR issues

Post by hents99 » Mon 09 Jul, 2018 4:24 pm

https://goo.gl/images/pEykxi

Two types. New type is with round connector.
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ngruzevs
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Re: ASR issues

Post by ngruzevs » Sun 05 Aug, 2018 4:22 pm

Well the issue can back, but this time ASR light was tripping once or twice a day. Eventually I replaced every fuse, that was two weeks ago, haven't had a single reoccurrence since.
Current Garage
1971 MK2 Jensen Interceptor Regency Red Jeremy
1979 W116 450SE Brilliant Red Metallic Claudia
1985 W126 280SE Thistle Green Max
1987 W126 300SE (SA Delivered) Pearl Grey Matt Oscar
2018 Hyundai i30N Polar White Penelope

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carina
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Re: ASR issues

Post by carina » Sat 25 Aug, 2018 5:03 pm

Attached is an image, the tempomat servo is behind the radiator hose , lovely new looking in silver.
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1991 420se . "Flosshilde".
1982 500SEC "Goldie" .Soon to be Black.
1955 220a Ponton, 'Polly' still getting over the fact I now have a Merc that is 3 years younger than me.

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