the terminals were encrusted and i had a hard time getting the connector off. once i unplugged it i cleaned the terminals with a soft wire brush and fine sandpaper for good measure. i sprayed a little wd40 on it and plugged it back in and the light stayed off.
1993 300e-2.8 - gone now <sigh>
"Do not adjust your mind, it's reality that's malfunctioning"