W123

A couple of years ago I installed the fuel boost pump sold on this site (DSE-COMAEBP) and the optional filter. Can failure of this pump result in fuel supply problems?

I ask because yesterday I developed the classic symptoms of a fuel supply problem: the car will start but runs rough and eventually stalls. I checked the boost pump filter, changed the main fuel filter and bled the air from the system, No change. I then ran diesel purge through the injectors and re-bled the air. No change.

I help a friend maintain her 1983 300TDT, and it is due for a transmission fluid & filter change. It has very recently been slipping when in "D" on an incline, such as at a stop sign at the top of a hill. It will just start rolling back. I will be changing the fluid & filter, and plan on using the Lucas additive as well. She has recently taken it to a couple different shops for some work to be done, and someone had apparently overfilled the transmission. I took out the excess with my mity-vac, but the performance remained the same.

My question is this:

What is your opinion of transmission flushes for these older MB auto trannies?