As of Sept 97, I've heard reports that official Mercedes parts for Unimog 404s are outrageously expensive. See the Unimog-S 404 Parts page for examples.
SA 35254 HD suspension
SA 35565 Rear stabilizer bar
SA 35907 Hardtop
SA 35013 Wheels 11.00-20 for tire size 12.5-20
SA 35249 Raised air-intake
SA 35174 Acoustic insulation
SA 35302 Power-assisted brakes
SA 35198 Additional fuel pump
for hot climates (overcomes vapor lock, draws from
front tank only)
SA 35540 Rev counter (tachometer)
SA 35405 Hydraulic jack
SA 35443 Steering wheel, larger
SA 35272 Lockable fuel filler cap
SA 35105 Reversing lamp
SA 35038 Sieve for fuel filler
SA 35025 Portable handlamp
SA 35012 Mechanical winch (MB)
SA 35014 Rear tow coupling
SA 35015 Steering protection plate
SA 35017 Tool box
SA 35141 Dynamo 600W/24V (DC generator)
SA 35465 Dynamo 600W/24V, sealed (DC generator)
SA 35496 Alternator
SA 35163 Engine and battery pre-heating (cold climates)
SA 35181 Ammeter
There was also a tropical radiator (plus wax-type thermostat)
available, but I do not have the SA number.
A cab hardtop (for soft top cabs) was manufactured by:
ELLER Karosserie-Kunstoffbau
Industrie Str. 4
D 7573 Sinzheim/Baden-Baden
Germany
Featured sandwiched shell construction to insulate
against extreme temperatures and fitted with a
large sliding rear window and two-stage ventilation flap
in the roof. Similar hardtops were also available for
403/406/413/416 models.