For the 2014 Mercedes Benz ML350 with the 3.0L 6-cylinder Engine Code 642.826 N Diesel Turbo, the engine oil capacity is 8.5 quarts (including filter replacement). Recommended viscosities include 0W-30 or 0W-40 for all temperatures, and 5W-30, 5W-40, or 5W-50 for temperatures above -25°C. AMSOIL recommends AMSOIL 0W-30 MS 100% Synthetic European Motor Oil (EOTQT-EA) and the MANN-FILTERS HU821X-EA oil filter.
What oil does a 2014 Mercedes Benz ML350 take?
The 2014 Mercedes Benz ML350 with the 3.0L 6-cylinder engine (Code 642.826 N) requires specific oil viscosities to ensure proper lubrication and emissions system compatibility. The AMSOIL lookup lists several options depending on your operating temperature.
AMSOIL product recommendations
Based on the AMSOIL lookup for your 2014 Mercedes Benz ML350, here are the recommended products for your maintenance needs.
Engine Oil & Filter
| Product Name | Code |
|---|---|
| AMSOIL 0W-30 MS 100% Synthetic European Motor Oil | EOTQT-EA |
| MANN-FILTERS Oil Filter | HU821X-EA |
Coolant & Antifreeze
| Product Name | Code |
|---|---|
| AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
Automatic Transmission Fluid
| Product Name | Code |
|---|---|
| AMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF | ATLPK-EA |
| AMSOIL OE Fuel-Efficient 100% Synthetic ATF | OTLQT-EA |
Transfer Case Lubricant
| Product Name | Code |
|---|---|
| AMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF | ATLPK-EA |
| AMSOIL OE Fuel-Efficient 100% Synthetic ATF | OTLQT-EA |
Engine Oil Viscosity Options
| Condition | Viscosity |
|---|---|
| All Temperatures | 0W-30, 0W-40 |
| Above -25°C | 5W-30, 5W-40, 5W-50 |
AMSOIL lookup oil grade: SEO59
Engine Oil Capacity
| Description | Capacity |
|---|---|
| With Filter Change | 8.5 quarts |
Note: After refilling, always check the oil level.
Oil Drain Plug Torque Specification
| Component | Size/Spec | Torque |
|---|---|---|
| Oil Drain Plug | 24 MM Plug | 33 ft/lbs |
How much transmission and coolant fluid is required?
Proper fluid levels are critical for the longevity of the 722.9 automatic transmission and the cooling system in your BlueTEC diesel engine. Ensure you use the correct capacity for your specific configuration.
Automatic Transmission Capacity (7-speed 722.9)
| Configuration | Total Fill Capacity |
|---|---|
| Standard 722.9 | 9.5 quarts |
Important Notes:
– If your datacard has the A89 code (Reduced-Friction), the fluid is Blue in color.
– If your datacard does NOT have the A89 code, the fluid is Red in color.
Coolant Capacity
| Component | Capacity |
|---|---|
| Engine Cooling System | 12.2 quarts |
Transfer Case Capacity
| Configuration | Capacity |
|---|---|
| Double Speed | 3.2 pints |
| Single Speed | 1.1 pints |
Diesel maintenance notes for this vehicle
Maintaining a BlueTEC diesel engine requires attention to specialized components. The OM642 engine utilizes common rail direct injection and a variable nozzle turbocharger, which necessitates high-quality lubrication to prevent soot buildup and maintain injector health.
- Emissions Systems: This vehicle uses BlueTEC technology (including SCR/AdBlue or NOx storage catalysts). Monitoring the Diesel Particulate Filter (DPF) and urea injection processes is essential.
- Oil Selection: Diesel engines of this type typically require specialized low-ash oils to prevent premature clogging of the DPF.
- Balance Shaft: The V6 design includes a counter-rotating balance shaft between cylinder banks to manage vibrations; consistent oil pressure is vital for its operation.
Common diesel oil-related concerns and how AMSOIL products may help
Diesel engines face unique stresses such as soot loading and high heat. The following table outlines how specific AMSOIL products can support your maintenance routine.
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Soot & DPF Clogging | High soot levels can clog the Diesel Particulate Filter. | EOTQT-EA | Designed for European diesel engines to protect emissions systems. | Does not replace DPF cleaning if already clogged. |
| High Operating Temps | Heat can degrade coolant and transmission fluid. | ANTPC1G-EA | Engineered to exceed OEM requirements for heat protection. | Requires correct mixing ratios if concentrated. |
| Transmission Wear | Heavy towing and terrain stress the 722.9 gearbox. | ATLPK-EA | Provides reserve protection during heavy use and abuse. | Diagnosis required for mechanical failures. |
Common maintenance concerns for this vehicle
Based on technical research, owners of the 2014 ML350 should be aware of several key areas:
- Emissions Control: Monitoring Diesel Exhaust Fluid (DEF/AdBlue) levels and regeneration cycles is a priority for BlueTEC owners.
- Active Curve System (ACS): There have been documented concerns regarding the ACS reservoir; if oil levels are low, it may foam and leak from vent holes.
- Software Updates: The vehicle’s communication modules and emergency call systems may require software updates to ensure accurate location relaying.
Recall, TSB, and manufacturer communication notes
Official NHTSA research indicates the following recalls for the 2014 Mercedes Benz ML350:
- Communication Software: A recall (Campaign 19V787000) was issued regarding a software fault in the emergency call system (eCall) that could cause inaccurate date/time and location data.
- Suspension (ACS): A recall (Campaign 18V272000) addressed the Active Curve System (ACS). If the reservoir oil is low, it may foam and leak from vent holes, potentially increasing fire risk.
Note: Always verify open recalls by checking your specific VIN through Mercedes-Benz or the NHTSA website.
About this vehicle
The 2014 Mercedes-Benz ML350 BlueTEC is a premium mid-size SUV powered by the OM642 engine family. This 3.0L V6 diesel engine is a cornerstone of Mercedes-Benz’s diesel engineering, featuring an aluminum block and head construction and a 72-degree V configuration. It utilizes common rail direct injection and a variable nozzle turbocharger to balance performance with efficiency.
As part of the BlueTEC technology suite, this vehicle is engineered for advanced NOx reduction. This typically involves Selective Catalytic Reduction (SCR) using Diesel Exhaust Fluid (AdBlue) or a NOx storage catalyst system to meet stringent emissions standards. Because these systems are complex, owners often focus their maintenance on the health of the particulate filter (DPF), urea injection processes, and maintaining clean fuel systems.
The OM642 engine is known for its durability but requires strict adherence to specialized low-ash oil specifications to protect the sensitive aftertreatment components. Owners frequently research service intervals for DEF and the management of soot loading within the exhaust system to ensure long-term reliability and ULEV certification compliance.
Common questions about this vehicle’s diesel oil and maintenance
What is the correct oil viscosity for my 2014 ML350 diesel?
The AMSOIL lookup recommends 0W-30 or 0W-40 for all temperatures. If you operate in environments above -25°C, 5W-30, 5W-40, or 5W-50 are also listed options.
How much oil does the 642.826 engine take?
The capacity is 8.5 quarts when performing a service that includes a filter change. Always verify the level after refilling.
Can I use any antifreeze in my Mercedes BlueTEC?
It is recommended to use an OAT (poly-organic acid) formulation like ANTPC1G-EA which is compatible with other colors and protects all cooling system metals and gaskets.
What should I do about the transmission fluid color?
The color depends on your datacard. If you have the A89 (Reduced-Friction) code, use blue fluid. If you do not have that code, use red fluid. The 722.9 transmission has a total fill capacity of 9.5 quarts.
Does my diesel need special additives?
While not required for all, owners often use fuel additives to maintain injector health and manage cetane levels in diesel engines.
How do I check for active recalls on my ML350?
You should contact a Mercedes-Benz dealer or visit the NHTSA website and provide your specific VIN to ensure all software updates and mechanical recalls (like those for the ACS system) are addressed.
Disclaimer: This information is derived from provided source data. Always consult your vehicle’s owner manual or a certified professional before performing maintenance.