Evan,
here is another happy customer. I send you the mail I received today from another diesel enthousiast person, driving a of course a E300TD. This is great. I didn't do anything yet as I am not really an electronic person but I should look into it properly.
Thank you from me and thank you from DM:
Olivier
I've performed the EGR delete as shown in THIS thread, and it appears to work very well.

It makes sense that the MAF voltage can be dragged down by the EGR Low signal, I just hadn't got round to thinking about it.

I'm not a member of that forum so can you please say thanks to KarTek for me, for putting the research into this.

regards