i think you have to keep in mind specially with the last post that 93 was the changeover to the M104 engine. there were a couple of problem spots when they did that - to the extent that certain publications rate it a "stay away" year. to me this was a puzzle since the M104 engine had been around prior to that. this is the very same engine that is in the C280...
1993 300e-2.8 - gone now <sigh>
"Do not adjust your mind, it's reality that's malfunctioning"