[MBZ] Sensor in Injection Pump '90 300D

[John Peterson]

I've been trying to diagnose a loss in boost in my '90 300D.  I brought it 
to the indie who found that (1) a vacuum tranducer is out and (2) he thinks 
a sensor on the injection pump is giving no electronic signal to the ECU. 
He says a 2k injection pump is necessary.

Is there any more economical way of changing this sensor?  Rebuilt IP? 
Seems hard to believe it would be so buried inside that it can't be replaced 
if necessary.

Thanks Friends!

John Peterson
Kingston RI
1990 300D 2.5 127k
1991 300D 2.5 72k