Lubricate threads - maybe.
Lubricate the cone or seat - never.
That link that @Trav posted is the first time I’ve ever seen lubrication specified for the cone itself.
Mercedes says to check All the surfaces, including bolt seats, hub surface, threads, bolts, and wheels for contamination, including grease or oil, and to remove all of it.
Then they go on to say specifically “do not apply grease or other lubricants to threads of wheel bolts, wheel nuts, wheel hubs, wheel flanges, or wheel studs.”
Volvo says to lubricate the hub center (on which the wheel centers) with their paste, which is antiseize. They don’t say one way or the other about thread lubrication.
But they have updated their wheel bolt design to a contained separate cone, like the bolt pictured by Trav’s link which seems to be less sensitive to over-tightening if lubricated.
Perhaps they know something about how their bolts are being installed?
Lubricate the cone or seat - never.
That link that @Trav posted is the first time I’ve ever seen lubrication specified for the cone itself.
Mercedes says to check All the surfaces, including bolt seats, hub surface, threads, bolts, and wheels for contamination, including grease or oil, and to remove all of it.
Then they go on to say specifically “do not apply grease or other lubricants to threads of wheel bolts, wheel nuts, wheel hubs, wheel flanges, or wheel studs.”
Volvo says to lubricate the hub center (on which the wheel centers) with their paste, which is antiseize. They don’t say one way or the other about thread lubrication.
But they have updated their wheel bolt design to a contained separate cone, like the bolt pictured by Trav’s link which seems to be less sensitive to over-tightening if lubricated.
Perhaps they know something about how their bolts are being installed?