My check engine light has been on for a while now.
Today I realized that it only goes on when I depress the brake pedal.
I never noticed before as I always brake when I start the car. I
turned it off in the street today and drove several blocks. It never
came on until I braked.
Any idea what may be happening? It's a 1987 300e.
Mutant Bluegrass That Rocks!