Disassembly of the slat grill.
The tub in the above shots, has been removed from the frame, and is leaning against the wall.
Here is the frame number 118754.  Notice the lack of MB infront on the s/n.
Look at the 2 holes on the far left.  The left hole is for the Canadian axle lamp switch and the right one is for the stop lamp switch for black out conditions.  There was a label above the switches indicating this.  
Notice the slat grill GAS gauge instead of the normal FUEL gauge.  Also notice the trouble lamp socket to the right of the gauges, that is controlled by the switch above the speedo.