You might show a little more patience as some of us don't read the forum on a daily basis. My 98 ML320 showed the very same symptoms, with random actuation of the ets, abs light, then more permanent. Not having any cold weather, I couldn't duplicate that part.

My problem turned out to be bad solder joints in the ABS module. Bad solder joints seem to be hereditory with Mercedes, over the years. The joints involved are the leads that feed the ABS pump motor, found just below the windshield washer tank.

The dealers have been known to blame the ABS failure on leaking windshield washer tanks. the module is about $900. Since the printed circuit is fairly well sealed, I doubt this. Maybe your solder joints are conducting better when cold and will become intemittent when hot.

Part of the start up procedure is for the ECM to test the pressure pump so when it doesn't run, it sets the codes and locks out ABS and ETS.

Not withstanding all the above, the PC board can be removed fairly easily after removing the drivers side headlight assembly. 4 torx screws hold the assembly on. Keep things clean as you will be exposing hydraulic pistons.

If you are handy with a VOM, you can verify which joint is open. Personally, I would just resolder both pump motor connections where they land on the PC board. You must remove about 1/4 inch of semi clear sealer to do this.

I have some pictures if anyone is interested in trying this.

Regards,

Jim in Phoenix