You can look the part numbers in one of the free EPC sites. Most of those parts should be the same as a US vehicle of the same approx. year with a 2.8 engine. Yours is a M110.990 which was used int nthe 280 R107 from ''81-'85.

Free EPC.

https://mercedes.7zap.com/en/eu/fg/car/

https://nemigaparts.com/cat_spares/epc/mercedes/