Four-door rear-wheel-drive luxury sedan · 3.2-liter M104 DOHC inline-six
1994 Mercedes-Benz S 320 Automatic
The preserved factory North American owner's-manual index lists the S 320 for model year 1994; the Mercedes-Benz archive establishes its W140 model identity.

Photo: “1994 Mercedes-Benz 500 S (W140) (4797740984)” by Spanish Coches / Wikimedia Commons, licensed under CC BY 2.0. Cropped to 16:9.
Factory configuration
What this model is
- Trim
- S 320
- Body style
- Four-door rear-wheel-drive luxury sedan
- Engine
- 3.2-liter M104 DOHC inline-six
- Transmission
- 4-speed automatic
Configuration-specific ownership
Maintenance for this exact configuration
These items are filtered to the engine, transmission, trim, and model-year applicability recorded for this configuration. Broad Amazon category searches are suppressed here; shopping links appear only beside catalog-backed part numbers.
Service desk
What this car needs & when
Use this as a service-planning checklist for 1994 Mercedes-Benz S 320 Automatic. Start with the interval, confirm which engine or configuration you have, then use an exact ordering reference when one is verified.
- Service topics
- 3
- Factory intervals
- 2
- Fitment-scoped
- 3
- Exact references
- 1
Before orderingIdentify your engine, options and build date.Part numbers and sizes can change within one model year. Shopping links appear only for catalog-backed references; still verify the listing against your vehicle before ordering.
Lubrication service
Sourced interval available
Source: Mercedes-Benz — W140 maintenance intervals (MY1994 revision, preserved by Operation CHARM) · normal operating-condition intervals — lubrication service · checked
Maintenance service
Source: Mercedes-Benz — W140 maintenance intervals (MY1994 revision, preserved by Operation CHARM) · normal operating-condition intervals — maintenance service · checked
Engine air filter
Exact reference available
Source: Mercedes-Benz — W140 maintenance intervals (MY1994 revision, preserved by Operation CHARM) · additional maintenance jobs at maintenance service — replace air-filter element · checked
S 320 — 3.2-liter M104 DOHC inline-six
K&N 33-2130
Source: K&N Engineering — 2017 European Automotive Catalog, S-Class application tables (archived copy) · W140 S-Class table — S 320, 1994 — 33-2130 · checked
Verified ordering references
- Service replacementK&N 33-2130
Qty. 1 · Reusable engine air-filter element · catalog-listed
K&N lists one element for this application; confirm VIN and build date before ordering.
Catalog: K&N Engineering — 2017 European Automotive Catalog, S-Class application tables (archived copy) · W140 S-Class table — S 320, 1994 — 33-2130 · checked
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Engine oil filter
Fitment must be confirmed
Use the exact engine, VIN, and build date to confirm the catalogued service part before ordering.
Sources
Other 1994 configurations