My car does it, 1992 300ce M104 engine, but for like 3 to 4 seconds until the oil pressure comes up.
Depending on yoru oil viscosity, this noise could go away. I use 20w50 all year around in Los Angeles.
It might be the reason for the ticking.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.