Sounds like the traction control or stability control thinks you're slipping? I would inspect for damaged wheel speed sensors, they get crudded up with metallic brake dust sometimes. I assume all four tires are same size?

You can disable the traction control by pushing the front-most button on the left side of the shifter. It will illuminate the triangle solid to warn you that you've disabled this system, but it will no longer engage the system and blink at you. You'll have to hit the button each time you start the engine (it does not persist). In fact you will definitely want to do this until you get it resolved, because when the TC engages, it selectively applies the brakes to one wheel - and it will continue to do so until it thinks the car has stopped slipping - or the brakes overheat and the pads catch on fire - whichever happens first. Ask me how I know.

I would also scan for codes at the 38 pin diagnostic connector (not the OBD2), as there may be an intermittent wheel speed code stored that will help narrow it down.

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1998 E300 turbodiesel

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