Circuit 129
Your car

Fuses

Three boxes. One of them is why the radio is dark.

Photograph the card in your lid — numbering drifted, and lettered slots A–F are named on that card, not always on the plastic. Maps below are the common 1992–1998 R129 layout. Radio is fuse 9 plus letter A, not a 16 A red named B.

Engine bayTrunkBattery
18A28A38A416A58A68A78A88A98A1116A128A138A148A158A168AA8AB8AC8AD16AE / F25A

Tap a slot. Colours: white 8 A, red 16 A, blue 25 A, green 30 A.

Engine-bay fuse & relay module

Fuse 16 · 8 A white

High beam right and high-beam indicator

If the dash high-beam tell-tale is dead with the right lamp, this fuse is the common point.

high beam righthigh beam indicator
Where
Under the hood, driver’s side on LHD cars (left, near the bulkhead / washer bottle). Black ‘coffin’ with a hinged lid. The fuse card lives in that lid — photograph it; numbering drifted across the years.
How to open
Open the lid toward the wing. Numbered slots 1–16 are the two obvious rows. Lettered slots A–F (sometimes G/H) sit in the same coffin — usually a third row or the inner edge — and are named on the paper card, often not moulded in the plastic. Empty lettered slots are normal (no CD, no seat heat, no aux heater). Relays click in behind a second cover. A few maxi / high-current fuses hide under a black module toward the firewall.
Notes
Original Mercedes GBC ceramic fuses: white 8 A, red 16 A, blue 25 A, green 30 A. Aftermarket ATC / mini blades use a different colour code (red = 10 A, blue = 15 A) and have no 16 A size — a re-fused box will not contain a ‘red 16 A’. Water in the lid gasket corrodes the tracks. If a fuse looks good but the circuit is dead, pull it and check the copper rails.