M-Class (W163) Produced 1998-2005: ML 230, ML 320, ML 350, ML 400 CDI, ML 430, ML 500, ML 270 CDI

BAS/ESP indicator light on

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Old Dec 15, 2015 | 04:08 AM
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esoul16's Avatar
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2003 ML350 Inspiration Package
BAS/ESP indicator light on

The yellow BAS/ESP indicator light on my dash is on display when the engine is running/i'm driving. I checked the manual and saw all the possible causes for the BAS/ESP light to display. The most likely would be malfunction of the BAS or ESP.

1.) How is the BAS/ESP Checked for malfunction? If this turns out to be true after checking the BAS/ESP, I just want to know ahead of time, is there a replacement part in the car that is responsible for BAS/ESP function? Can this part be purchased aftermarket brand new or can it only be got fairly used.

2.) I am a cautious driver and my brakes are still working fine. If I do nothing about this, is there any critical danger to me and/or the car if the BAS/ESP malfunctioning is not fixed. I read in the manual that the BAS/ESP does not prevent accidents only careful driving does.

Your feedback is highly appreciated.
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Old Dec 15, 2015 | 04:49 AM
  #2  
Maj. Dundee's Avatar
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2002 ML 320 & 2006 ML500
You must have the codes read with a scanner. Look at all the possibilities.
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ESP Codes.PDF (86.2 KB, 598 views)
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Old Dec 17, 2015 | 02:35 PM
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2012 G550, 2018 AMG GTR, 2020 Sprinter 2500
1st common item - brake switch. 2nd, yaw sensor. For me, yaw sensor did the trick.
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Old Dec 18, 2015 | 08:19 AM
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Maj. Dundee's Avatar
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2002 ML 320 & 2006 ML500
Originally Posted by Jetpilot718
1st common item - brake switch. 2nd, yaw sensor. For me, yaw sensor did the trick.

There is no Brake Light Sw. on 2003-2005 ML's.
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