Thanks for the reply. I have not been able to find any EGR system on this engine. I'm sure there are many, many configurations of these vehicles,

Just for the record/future information:
Australian Delivered W126 M103s (i.e. 300SE/L) do not have an EGR, intake temp sensor OR Air Pump (the Air Pump is a symbiotic system with the EGR from my understanding).
They DO however have a Catalytic Converter (two exhaust manifold downs straighten at the floor of the vehicle & this point both pipes feed into one "collector" to a double width Catalytic Converter, then straight after the CC they split back to two lines for the rest of the system except for where they feed through the resonator & Muffler) the CC is serviced by a single Heated three wire O2 Sensor that bolts into the top of the "Collector" just before the CC.
I just thought that might help someone in the future!