1995 E320SE ASR Activating Randomly? Help? - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 11-07-2009, 03:50 PM Thread Starter
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1995 E320SE ASR Activating Randomly? Help?


My 95 E320 has about 140k miles and generally drives well, except for inconsistent acceleration during around town driving.

Recently, my ASR light came on after a short drive and I could not accelerate from Park-to-Reverse-to-Drive whatsoever. The peddle went flat to the floor with no response. I turned the car off and let the engine settle for about 5 minutes and I then could drive normally.

Over a week later, the car inexplicably pulled the same stunt in a crowded parking lot. The ASR light came on when I pulled out and I could not accelerate. I had to leave the car for about an hour and came back and drove home with no issue.

Would this ASR issue also affect my regular acceleration? I have no idea where to start with the ASR.

My Check Engine Light has been on for a long time, even after extensive repairs (OVP relay, purge valve, alternator, new drive belts, rebuilt A/C compressor, etc.) that only briefly turned off the CEL. I eventually just ignored the light because my research indicated no major issue. Is the CEL related to the ASR malfunction?

Computer Codes?
Wiring Harness?
Alignment / Tire size?

Thank you kindly for any help!!!
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post #2 of 4 (permalink) Old 11-07-2009, 06:46 PM
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a fault that triggers the CEL can give you the problems your experiencing by putting the car into the "limp home" mode.

My experience is that the ASR light won't do that IF the light only comes on when you accelerate and it detects slip. However, the ASR light staying on indicates a failure of the ASR system which could also cause the problems.

Pull the codes and see what it shows.


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post #3 of 4 (permalink) Old 11-07-2009, 06:59 PM
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Is the ASR malfunction light on? Also, if the problem occurs shouldn't turning the ASR off solve the immediate problem?
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post #4 of 4 (permalink) Old 12-19-2009, 12:45 PM Thread Starter
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Exclamation PLEASE HELP!!! ASR Reset???

What is Limp Home mode? My ASR light has come on now with increasing frequency and usually goes off after I turn off the car.

However, this recent time, the ASR turned on and stayed on, refusing to let me accelerate whatsoever. I cannot even go reverse with any acceleration. I put the pedal to the floor with no response. The snow chain light accidentally came on ( l never use this in So. California). My car is stuck in a parking lot at work, so this stupid ASR is ruining my life.

The engine seems fine, but the authoritarian ASR is acting as the king of its domain, pointing its scepter at the lowly serf (me) and disabling all driving of the vehicle.

How can I reset the ASR? Would removing and reinstalling the battery reset the ASR computer issue? Is something else at play? Any advice on a battery reinstall?

I had OVP, alternator, A/C compressor, purge valve work done since January if these affect the issue.
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