Originally Posted by
IBLUBYU
Thanks for your responses..... I checked Autohauz az for that part number, and not on their parts list. I'll call them and inquire. If not I'll just get a selection of screws and washers and use what fits. Thanks again ... over and out 
That part number is on the Autohaus package label the screws came in. It had me wondering. I did an internet search on the number and verified it is correct and there are a number of sources out there. Pelican parts have them for $1.00 each.
Here is an ebay listing for 10 for $18.88 with free shipping.
http://www.ebay.com/itm/Mercedes-Set-Of-10-Undercar-Shield-Sheet-Metal-Screw-2019900536-/131230105970?pt=Motors_Car_Truck_Parts_Accessories&hash=item1e8dec8172&vxp=mtr