For the 1983 Mercedes Benz 300td with the 3.0L 5-cylinder diesel engine, the oil capacity is 7.9 quarts with a filter change. Recommended viscosities include 0W-30 and 0W-40 for all temperatures, 10W-40 for temperatures above -20°C, and 5W-30, 5W-40, or 5W-50 for temperatures above -25°C. AMSOIL recommends AMSOIL 5W-40 FS 100% Synthetic European Motor Oil (EFMQT-EA) for this application.
What oil does a 1983 Mercedes Benz 300td take?
The engine requires an oil with the AMSOIL lookup oil grade SEO41. Depending on your operating environment, you should select a viscosity that matches your local temperature ranges to ensure proper lubrication and protection.
AMSOIL product recommendations
Based on the AMSOIL lookup data, the following products are recommended for your 1983 Mercedes Benz 300td maintenance needs:
| Component | Product Name | Part Code |
|---|---|---|
| Engine Oil | AMSOIL 5W-40 FS 100% Synthetic European Motor Oil | EFMQT-EA |
| Engine Oil | AMSOIL 0W-40 FS 100% Synthetic European Motor Oil | EFOQT-EA |
| Coolant | AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| Coolant | AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
| Automatic Transmission | AMSOIL Signature Series Multi-Vehicle 100% Synthetic ATF | ATFPK-EA |
| Automatic Transmission | AMSOIL OE Multi-Vehicle 100% Synthetic ATF | OTFQT-EA |
| Brake Fluid | AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid | BFLVCN-EA |
| Power Steering | AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid | PSFCN-EA |
Engine Oil Viscosity Options
| Temperature Range | Viscosity |
|---|---|
| All Temperatures | 0W-30, 0W-40 |
| Above -20°C | 10W-40 |
| Above -25°C | 5W-30, 5W-40, 5W-50 |
Engine Oil Details
The AMSOIL lookup note provides the following technical details for oil service:
- Capacity: 7.9 quarts (with filter). Note: On models with an oil cooler, additional oil may be needed when the cooler is drained.
- Drain Plug Torque: 20 ft/lbs.
- Service Tip: Allow 5 minutes after refilling or turning the engine off before checking the oil level.
How much oil and coolant does it take?
Proper fluid capacity is critical for maintaining the longevity of the OM617 engine family. Always verify your specific vehicle’s requirements against a service manual.
Fluid Capacities
| Component | Capacity |
|---|---|
| Engine Oil (with filter) | 7.9 quarts |
| Coolant | 10.6 quarts |
| Automatic Transmission (4-speed 722.3) Total Fill | 7.7 quarts |
| Automatic Transmission (4-speed 722.3) Initial Fill | 6.6 quarts |
| Transfer Case (Rear) | 2.3 pints |
Transmission and Brake Fluid Specifications
The 1983 Mercedes Benz 300td uses specific transmission and braking systems that require compatible fluids for safe and smooth operation.
Automatic Transmission
For the Automatic Transmission, the AMSOIL lookup references specification 722.3….AF3.
Brake Fluid
The AMSOIL lookup note for brake fluid recommends using DOT 4 plus (specifically referencing part numbers 0009895605090109, 0009895605110111, or 000989080701) or products approved on MB Sheet 331.0.
Common diesel oil-related concerns and how AMSOIL products may help
Maintaining a classic diesel engine requires addressing specific operational challenges common to high-mileage European diesels.
| Concern | Why it matters | AMSOIL product from this lookup | How it may help | Important limitation |
|---|---|---|---|---|
| Diesel Injector Deposits | Dirty injectors can cause poor performance and smoke. | Diesel Injector Clean | Cleans dirty injectors and lubricates pumps to reduce wear. | Treat rate varies by bottle size. |
| Cold Weather Starting | Low temperatures can affect fuel flow and combustion. | Diesel Cetane Boost | Increases cetane up to 8 points and improves startability. | Not a substitute for proper fuel storage. |
| Engine Storage Rust | Long periods of inactivity can lead to internal corrosion. | Engine Fogging Oil | Provides rust prevention for internal engine components. | Designed for storage/inactivity only. |
Diesel maintenance notes for this vehicle
- Filtration: While specific oil filter part numbers are not confirmed from the source data, high-quality filtration is a priority for the OM617 engine family.
- Cooling System: For coolant, AMSOIL offers a poly-organic acid (OAT) formulation that is phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free.
- Fuel Additives: Using additives like Diesel Injector Clean + Cetane Boost can provide combined benefits of detergency and improved lubricity.
Common maintenance concerns for this vehicle
Owners of the W123 chassis often focus on several key areas to preserve mechanical integrity:
- Cooling System Integrity: Regular checks of hoses, gaskets, and metal components are recommended.
- Fuel System Maintenance: Ensuring fuel system integrity is vital for diesel longevity.
- Suspension Upkeep: Given the age of the platform, suspension components should be inspected regularly.
Recall, TSB, and manufacturer communication notes
Official NHTSA recall research for the 1983 Mercedes Benz 300td returned no recall records. Additionally, no consumer complaints were found in the NHTSA database for this specific year/make/model combination. However, owners should always verify open recalls by VIN, as applicability depends on production date and equipment.
About this vehicle
The 1983 Mercedes-Benz 300td is a diesel-powered variant of the highly regarded W123 series. Produced by German manufacturer Mercedes-Benz, the W123 range is celebrated for its exceptional durability and build quality. These vehicles gained a global reputation for reliability, frequently serving as taxicabs in Europe due to their ability to reach high mileages—often exceeding 500,000 kilometers—with only minor mechanical attention.
At the heart of this vehicle is a 3.0L 5-cylinder diesel engine, part of the OM617 engine family. The OM617 is a straight-5 diesel engine that is historically recognized as one of the most reliable engines ever produced, with some units reportedly reaching over 1,000,000 km without requiring a rebuild. This engine’s reputation for toughness contributed significantly to Mercedes-Benz’s popularity in North America during the 1980s.
While this vehicle is categorized under ‘Mercedes BlueTEC’ in some contexts, it should be noted that BlueTEC technology refers to much more modern diesel emissions systems. For a 1983 model, users should verify all technical specifications against period-correct service manuals rather than modern documentation.
Common questions about this vehicle’s diesel oil and maintenance
What is the engine oil capacity for my 300td?
The capacity is 7.9 quarts when performing a change with a new filter. If your model has an oil cooler, you may need additional oil if the cooler is drained during service.
Which AMSOIL oil is best for my Mercedes diesel?
AMSOIL lists 5W-40 FS 100% Synthetic European Motor Oil (EFMQT-EA) and 0W-40 FS 100% Synthetic European Motor Oil (EFOQT-EA) for European diesel applications.
How much transmission fluid does the 722.3 automatic take?
The total fill capacity is 7.7 quarts, while an initial fill typically requires 6.6 quarts.
Can I use AMSOIL additives in my diesel fuel?
Yes, AMSOIL offers several options including Diesel Injector Clean and Diesel Cetane Boost to help maintain injector health and combustion quality.
What torque spec should I use for the oil drain plug?
The confirmed torque specification for the oil drain plug is 20 ft/lbs.
How do I verify if my vehicle has any open recalls?
While no recalls were found in this research, you should always verify your specific vehicle’s status by checking your VIN through official manufacturer or NHTSA channels.
Disclaimer: Not all information provided is confirmed from source data. Always consult your owner’s manual and professional service technicians before performing maintenance on your vehicle.