Just curious, you are asking about the 123 chassis, yet your signature line says you own a 300 SD. That would be either a W116 chassis or W126 chassis. Neither one of the those has round fog lights.
The amber fog lights for the 123 were glass Bosch lamps with replaceable light bulbs form behind, H3 I believe.
1994 MB E320 Coupe (199,500 mi)
1992 MB 190E 2.6 (173,000 mi)
1983 Porsche 911SC (148,000 mi)
2004 Volvo V70 2.5T (198,000 mi)
President of CT/Westchester Section