My 89' 190e 3.0 (formerly 2.6) has some weird habits lately. About once or twice a week the ABS light will come on and I can feel the car shift forward, like the brakes are being applied lightly. This lasts for a few minutes, then the check engine light will flash and both turn off. Is it worn out brake sensors? I checked the front pads and replaced the rear, as well as some new brake fluid. Any ideas or info would be a big help.