See I'm still in the learning mode as well. I got quite familiar with the engine in the 95 E320 I had but this one is still fairly new to me. I have access to ALLDATA at work, tomorrow I'll see if there are 2 EGR's because if there is I believe that might fall into the possibility category.

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86 Nissan 720 P/U - 285K miles and counting!!
91 Volvo 240 - 218K miles and still going strong.
00 Mercedes E320 - 111K miles and lovin it!!!