If your friend has to replace the bumper he should look into new ones with air dams like 500e/amg etc. or see if a 94-95 front bumper would work.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.