Código cor da saia W126 ano 82

Th side mouldings ( which were self coloured=grey) were changed in mid 1985 from the early ribbed design to the plainer design which lasted the rest of the production run My guess would be the best match to the original would be grey metallic clearcoat (matt)
MB DB-7176 The code may be on your vehicle data sheet at the rear of the service book.

until chassisnumber:
021 011816
022,023 045631
032,033 021853
036,037 014397

Body colour: 040, 199, 312, 355, 735, 737, 740, 751, 877, 900, 904, 929, 930, 932, 934, 940
Bumper colour: 7175 (old number 7007) MATTGRAU

Body colour: 172, 473, 476, 479, 480, 482, 501, 504, 540, 568, 581, 587, 618, 623, 673, 680, 681, 684, 702, 803, 822, 875, 876, 880, 881
Bumper colour: 7174 (old number 7172) ANTHRAZITGRAU

Body colour: 427, 444, 459, 585
Bumper colour: 8414 MATTBRAUN

from chassisnumber:
021 011817
022,023 045632
032,033 021854
036,037 014398

Body colour: 199, 312, 355, 735, 737, 740, 751, 877, 900, 904, 929, 930, 932, 934, 940
Bumper colour: 7175 (old number 7007) MATTGRAU

Body colour: 040, 172, 479, 482, 501, 540, 568, 581, 587, 618, 680, 702, 803, 822, 875, 876, 880, 881
Bumper colour: 7174 (old number 7172) ANTHRAZITGRAU

Body colour: 427, 444, 459, 473, 476, 480, 504, 585, 623, 673, 681, 684
Bumper colour: 8414 MATTBRAUN

Bumper colour = side colour.

!!! These are Mercedes-Benz colour numbers, NOT RAL codes.
!!! This list is only for the models 280S, 280SE, 280SEL, 380SE, 380SEL, 500SE en 500SEL Gen I. SEC and Gen II have other colours.