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sprinkles08
sprinkles08, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 22683
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Thx when i am driving my 500SEL /1993, the ASR and ABS

Customer Question

hi
JA: Hello. How can we help?
Customer: thx when i am driving my 500SEL /1993
JA: What year is your 500SEL?
Customer: the ASR and ABS lighting on ! especially on the highway
JA: Is it just the ABS light? Or is the brake system warning light on, too?
Customer: sometime the brake system but today switch off! the brake pad are new and the brake fluid tank is full
JA: Are you fixing your 500SEL yourself? What have you tried so far?
Customer: last time i change the MAF
JA: Anything else you want the mechanic to know before I connect you?
Customer: before changing the MAF i drive the car without the filter cover and the old MAF for one day
Submitted: 10 months ago.
Category: Mercedes
Expert:  sprinkles08 replied 10 months ago.

Hello and welcome to JustAnswer!

These lights are on because the ABS module has seen a failure that will prevent proper ABS and traction control functions and has set a fault code. The problem could be many things including the module itself, the hydraulic control unit or pump motor, wiring, the brake switch; the most common cause for an ABS light is a bad wheel speed sensor.

The first step in diagnosing the problem will be to use a scan tool to see what fault codes have set and testing can be done from there.

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