thank you Pawel,
So based on the SLS catalog image (below), looks like I'm missing items #22 and #37.
Item #22 (Bracket, Start-Inj. Line), MB part no. 130-070-07-40; Item #37 (Bracket Clamp, Warmup Air Pipe), MB part number 127-995-04-01. Thank you again for your help, Charles