In the Mercedes-Benz W124 E-Class Technical Articles Intake Manifold Removal Mercedes-Benz W124 Intake Manifold Removal | 1986-1995 E-Class | Pelican Parts DIY Maintenance Article and in the figure 25, it says Inspect all the gaskets, hoses and lines for damage or excessive wear and replace as needed. You must always replace the intake manifold gaskets (red arrows). It is always a good idea and cheap insurance to replace the vacuum hoses (green arrow) and rubber boots or tubes that connect the manifolds (yellow arrows). Installation is the reverse of removal. Now would be a really good time to replace any suspect vacuum lines.

My question is what rubber boots or tubes that connect the manifolds (yellow arrows) exact part name and part number?

Also in the same technical article in the top that says Parts Required, it mentioned new o rings. What is the exact part name and part number? In some sections, o rings refers to air conditioner o rings, other says it is the fuel injectors o rings. I need to know exactly what o rings refers to as indicated in the technical article under the Parts required heading. Any comments?