Brake Light Switch Failure May Cause ESP/BAS Warning Lights on Mercedes-Benz CLK320

The ESP and BAS warning lights may illuminate due to a failed brake light switch. Replacement of the failed switch should correct this concern.

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Average mileage: 122,624 (87,850–168,000)
6 model years affected: 1998, 1999, 2000, 2001, more2002, 2005
21 people reported this problem
9 people shared problem details
The following dashboard warning lights come on together, displayed sequentially: ESP, BAS, Bulb failure when brake pedal depressed. This is an intermittent problem, sometimes the problem disappears for several days only to reappear again. Have replaced brake limit switch under brake pedal twice already (with new Beck/Arnley replacement part from RockAuto), but problem has come back after a few weeks to months after each replacement. I have another new switch ready, but it is also a Beck/Arnley, so I don't know if it will fail soon as well. Could the problem be elsewhere in the electrical system?
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Hello, my name is Andy. Can you help me to answer to my problem please : I had this problem before and I changed the Brake Light Switch, but sometime I still have ESP/BAS warning lights. I don't understand why and how can I do to fix this problem. Thank you for your help. Andy
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Brake lights wouldn't light up when brakes were used.also caused ABS /bas and ESP indicators to come on. I had a mechanic fix the brake switch. Now the brake lights work when brake pedal is pressed.
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Problem with the ESP/BAS Warning Light went away with the replacement of the brake light switch. Purchased a replacement Beck Arnley Brake Light Switch 201-1977 on Amazon for $9. Installation was easy, just pop open the small hatch located above the brake pedal and disconnect the two electrical connectors. There is a small tab on the side of the switch that needs to be pressed in order to twist the switch off the mounting bracket. Cheap first step when troubleshooting this type of issue.
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BAS/ESP warning light on
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ABS BAS light go on an doff. The dealership now wants to replace the BAS system for 1,300.00 sort of what the car costs....
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Today I went to MB dealer purchased new switch cost 22.50 Labor: put in by myselef cost 15 mins time Thanks you very much for your info.
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Yes i have this problem as well with my brake light switch. The part has been changed and yet still the warning light comes on and the car still don't go into park until you cut-off the car then put it in park. What is this?
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BAS - take vehicle to shop
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