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Q: What causes the BAS/ESP light to come on. on 2000 Mercedes-Benz C230

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Took the car to dealer,they said i need new battery, i never have a problem with starting the car, starts right up.They want $400 for a new battery installed.
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Well, it could mean that the emergency brake has not been fully released.The ABS system light is on if something has occurred within the ABS system. Something faulty may have happened there, get it checked out!
Keep in mind that the light will come on when there is wheel slippage on wet pavement or ice. If it is coming on for those reasons, it is normal. Are you talking about the yellow triangle light? If it is coming on without the car moving, then there is a problem.
It's the orange warning light on the left side of the panel - it goes out after starting the car then comes back on and stay lit but not everytime.Took it to the dealer but wants $400 to change the battery and $170plus labor to flush the brake fluid.
After rereading your question I realized that your talking about the amber light that is located on the far left side of the dash/instrument panel. I spoke with my mechanic and the only way to determine what is causing this is to hook your car's computer up to the shop computer in order to get the code that will show what the cause is.
The BAS light has been on in my car for a couple years and I was always told it was nothing major. The check engine light would come on and go off from time to time and progressively got worse and wouldn't go off. The car would tremble and shake at traffic lights and stop signs and sometimes just turn off completely. I brought my car to Mercedes and they said Transmission Codes are coming up and we can't fix it (they had no interest in helping me with an older car) My car has alot of miles on in (200,000) so I was thinking about ditching it. A friend told me that I should get the car looked at some place else because a lot of times you do not need to replace the whole transmission. To make a long story short, I had my car looked at at another local mechanic all I ended up needing was to replace was the Brake Light Switch. This mechanic saw all the transmission codes that mercedes saw, along with engine codes but told me that many of these codes go hand in hand and it could be something as cheap and simple to fix. They were right, The Brake Light switch was triggering all the other codes that came up. No more codes or lights on in my car and it is now driving perfectly! Sorry for the long post but I had to share.
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