might try JB weld in the holes and waxing the screws so you can get them out again..... Doing that to remake the threads.... I'm not sure if this works, so, I assume no responsibility....

__________________
All it takes for evil to prevail is for good men to stand by and do nothing.

Too many people tip toe through life, never attempting or doing anything great, hoping to make it safely to death... Bob Proctor

'95 S320 LWB
'87 300SDL
'04 E500 wagon 4matic