Hey guys I am n00b who recently got a 1987 300D OM603 turbo. School me in OM603 performance. Is there anything I should do off the bat to pick up some power and/or mpg? My ultimate goal is mpg because this car will never be "fast" but some extra HP and TQ without major downsides is also a plus.

Is there any recommended reading on 603 performance?

Things like EGR removal, or messing with the boost, good ideas? bad ideas?

Where are the common places I should check to make sure my car is running right before I try to upgrade it?

Does the OM603 have ALDA? I have been reading about cleaning out the alda bolts on OM617 motors.

Sorry if it is a broad post, I've always been a diesel fan, but these W124s are the first ones I've owned.