Ok guys I'm back. With the same problem with the 97" S500. I had these light on 6 months ago or maybe longer. I temporarily fixed the problem, so I thought. I did a search and most suggested replacing the brake lamp switch behind the brake pedal. well ok I did that and the lights went off. After driving it for a few months the light came back on. The lights come on after driving for a while, it depends on the duration of the trip. When the lights are on, all I have to do is turn off the car and when I restart the light are off. Replacing the brake lamp switch was my first fix. I guess the second place to look is the ABS sensors? I did not get the codes yet. I know I should check that first and I will have the answers before replacing parts first.

OK now, my question is, if I replace a part should the codes be reset or deleted? Do you know what I mean? Lets say the ASR/ABS lights are on and the code tells me it's the brake lamp switch, now I go and replace the brake lamp switch and the lights goes off. OK after replacing the part do I have to go back and reset or delete the error code?

Second question is, What is a good and cheap code reader for around $500? I need one that can scan for a 97" S500 and a 94" E420. It would be nice to be able to get the software for a laptop that can scan the code for that price. thanks guys

To start with spend $75-100 & have the codes read & then post them..approx 60 items can cause those lamps to come on.


Haven't seen any scan equipment & software that can read MB systems for less than $2500!

YES there are ODB2 systems for $100 but they read only the fuel system!

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As MB-Doc says, you NEED to get the codes read and written down so we can see what DTCs are stored. Need to read the Diag, EA, LH modules. Then RESET all of the codes, run the car and see what comes back. Also read MENU#24 on my pages showing what happens to a ETA.

I suspect that you will get the codes back and then you can plan your 'attack' to fix it.

For a code reader, the Palm Scanner in MENU#3 is ideal but as of now, don't know of any supplier of this part. There's probably others but not aware of them.

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'94 S500 Cpe

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OK thanks guys, I guess I'll have it checked it out at a later time, because the car seems to be running just fine other then the light being on. Once I have it scanned I'll post the codes up.