Parts required:
1. Original air filter assembly with intake pipe shortened to join (you will notice I used the oportunity for a fresh coat of paint). The removed section (not re-painted) is visible. The air temperature sensor needs to be relocated from the removed section to a section of the intake pipe that is to be retained. It can be fitted through an additional hole and secured with a nut.
2. Suitable length of 80mm I.D. spiral reinforced flexible hose.
3. Hose clamp to attach hose to air filter intake pipe.
4. Additional panel to ensure cold air is drawn from forward of radiator, oil cooler and condenser. The panel shown is to suit my W107.

Attached Thumbnails

 

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107.023: 350SLC, 3-speed auto, icon gold, parchment MBtex (sold 2012 after 29 years ownership).
107.026: 500SLC, 4-speed auto, thistle green, green velour.
124.090: 300TE, 4-speed auto, arctic white, cream-beige MBtex.
201.028: 190E 2.3 Sportline, 5-speed manual, arctic white, blue leather.
201.028: 190E 2.3, 4-speed auto, blue-black, grey MBtex.
201.034: 190E 2.3-16, 5-speed manual, blue-black, black leather.