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Old 11-04-2002, 12:30 PM
Join Date: Aug 1999
Location: Mission Viejo, CA, USA
Posts: 41
1992 400E Disable ASR

How can I disable the ASR on my 92 400E? California smog test requires running the car on a dynamometer. When I brought it in yesterday, the tech could not get it to work because the ASR kept triggering which aborted the test. Owners manual was of no help.

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Old 11-04-2002, 01:35 PM
Michael's Avatar
Join Date: Jul 1999
Location: CT, USA
Posts: 2,699
Unhook a front wheel speed sensor - it'll take ABS & ASR off-line.

Do a search; I posted a picture some time ago
"If everything seems under control, you're simply not going fast enough" --Mario Andretti

1995 E500 street car
1986 Porsche 944 Turbo S track car
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Old 11-04-2002, 06:52 PM
Join Date: Aug 1999
Location: Mission Viejo, CA, USA
Posts: 41
Thumbs up

I don't think its the duty of a Smog inspector to disconnect the wheel sensors. So I looked for another inspection station and found the answer:

In California, cars with slip or traction control and without a disengagement switch are tested the old way -- meaning no dynamometer. The tech said this is common on Mercedes. The only surprise is that the inspector yesterday did not already know this.

Test done. Car legal.
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