Hello all,

Need some help/advice please on my 1996 E320. I was driving along and suddenly the ETS (El. Traction Support) warning and light, plus the ABS light came on in my dash. At the exact same time, the speedometer stopped working as well. This happened twice before, but immediately went away. This time the warning lights are on for good and the speedo is still not working. Doing a bit of research here on the forum, it appears that the problem is most likely a sensor. My questions are:

-Which sensor is the one that gives the speedometer its signal? I suspect this one is bad since the speedo stopped working at the same time the warnings came up.

-Would a low voltage situation cause this problem? The battery is a bit old and on the weaker side, but it cranks over and starts the engine okay. There shouldn't be a low voltage problem because the alternator is charging when the car is running anyway........correct?

-The brake light switch shouldn't be the problem since the brake lights are working fine. Or, does this switch have a dual function to it??

-The ABS sensors at the wheels shouldn't stop the speedo from working, should they? I find it a bit hard to believe that Mercedes uses the ABS sensors as a speedo output too??

Any advice, opinions, or personal experience stories with the same kind of problem would be greatly appreciated!

Thanks very much in advance!