R-Class (W251) Produced 2006-2013: R320CDI, R350, R420CDI, R500

Abs esp inoperative warning light.

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Old 07-19-2017, 10:33 PM
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R280 L
Abs esp inoperative warning light.

Abs, ESP inoperative, driving @ 30km/hr
hi all. I was just driving slow at 30km/hr suddenly the warning light pops up.
I didnt stop or anything but kept on driving till i got home.

Because 2 weeks ago i was at a dealer and they plugged in the Star diagnostic tool and there wasnt any errors at all...

What could be your guesses,
My front two tires are about 15% left...i'll be buying a new pair soon.

Thanks.

Edit: the road conditions were not slippery. Its nice and dry...i parked the car for a while and reatarted the engine the warning came back on.
​​​​​.

Last edited by szulkarn; 07-19-2017 at 10:48 PM.
Old 07-20-2017, 05:27 AM
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2008 R350, 2012 Azera
More than likely its a wheel speed sensor.
Old 07-21-2017, 02:51 AM
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R280 L
Right front speed sensor : check wheel bearings
went to shop, had it diagnosed and this came out.
The guy said the speensensor is broken...but im reading " check wheel bearings"... Im confused...
Old 07-23-2017, 06:33 PM
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2008 R320 CDI, 1987 560SL
You need to replace the ABS sensor in the wheel and probably the plastic bracket the holdscit from rubbing against the axle. 20 minute job. You can reach in there by cranking the steering wheel all the way and reaching in behind the wheel front the front.
Old 07-25-2017, 06:42 PM
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2005 C240 2011 R350
The speed ring cog is attached to the hub/bearing. when it turns the speed sensor can measure how fast. Unless there was some unusual damage to the cog, it should be only the sensor.

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