lug bolts for alloy wheels (both Bundt and non-Bundt wheels)

[Iconic]

The Tech Manual has a great writeup on this subject, but it left me with two questions (because of my lack of experience).
After I have the answers, I'll edit the manual (if nobody minds).
It is clear that the Bundt wheels require the longer lug bolts, but ...
1. Do we need the longer lug bolts for the non-original non-Bundt alloy wheels (from later Mercedes cars)? (I would guess not.)
2. Are the longer lug bolts for alloy Bundt wheels made of aluminum or steel (I hope steel).

Thanks in advance.

[bogeyman]

1. The steel replica alloys use the shorter bolts.
2. All lug bolts are steel.

[geezer]

I have also found that there are 2 types of lug bolts for alloy wheels.  What I have found while digging in the bone yards that not all alloy wheels are the same.  Some have a steel incert for the lug bolts and others don't.  In general what I have found is that the wheels with the steel incert use a lug bolt that has a ball shaped seat like the bolts used for steel wheels wheras the wheels without the steel incert use a bolt with a straight tapered seat.  In my search for Bundt wheels I found a bunch of wheels that were ruined because the wrong lug bolts were used.

[ja17]

Good observations, all original Mercedes bunt cake alloys have the steel inserts around the bolt holes. After market ones did not. Using too long of lug bolt in the rear will cause the lug bolt to enter the emergency brake area of the drum. At this point, the long bolts will lock up the rear end or ruin the emergency brake assemblies.