C250 AMG Warning Lights / Electrics Fault

ffhart

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C250 AMG Sport Diesel 2012
C250 AMG Diesel 2012 has recently started showing:
Run Flat Indicator - Inoperable
ABS Warning Light
ESP Inoperable

When these lights appear all additional systems become inactive eg no speed limiter, cruise control, eco mode, no stop start, no electronic hold and no auto lights.

Battery is showing 12.6 in the front and 13.1 in the boot without the engine running. With the engine running front battery shows 14.6

Car was running perfectly but was standing for a few weeks.

Would be very grateful for any advice / hints as to how to rectify this.
 

V6Matty

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sounds like something isn't getting a speed signal so first guess would be a sensor in the front wheel(s) and now I'm writing this I can't for the life of me remember what it's called. someone else should be along shortly thought that should have a better memory that I do today :)
 

turbopete

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as Matt. my first checks would be the ABS sensors and check the ABS ring for dirt etc as this can send these things haywire too
 
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ffhart

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Diagnostics

Have just managed to get some diagnostics ran and apparently it is the ECU!
Sounds expensive does anybody have any experience of this.
Many thanks
 
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ffhart

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Update

Make that -
Electronic Stability Control Unit problem !
 

V6Matty

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Ignor the fault it will be affected by a speed signal being incorrect from one of the wheels
 

television

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When the ESP module goes down it can take out the speed signal, hence the other problems as they cannot work without a speed signal. the car is too new to have wheel sensor problems in my eyes.
 
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turbopete

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When the ESP module goes down it can take out the speed signal, hence the other problems as they cannot work without a speed signal. the car is too new to have wheel sensor problems in my eyes.

it SHOULD be too new to have control module failures too though :rolleyes::rolleyes::rolleyes:
 


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