For the 2014 Mercedes Benz GLK250 with the 2.1L 4-cylinder diesel engine (Code 651.912 C), the oil capacity is 6.9 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) for this application.
What oil does a 2014 Mercedes Benz GLK250 take?
The 2014 Mercedes Benz GLK250 with the 2.1L diesel engine requires specific viscosities to ensure proper lubrication across varying temperature ranges. The AMSOIL lookup lists several options depending on your climate and operating conditions.
AMSOIL product recommendations
Based on the vehicle specifications, AMSOIL provides several high-performance lubrication options to support the maintenance of your Mercedes BlueTEC diesel engine and its associated systems.
Engine Oil
| Product Name | Part Code |
|---|---|
| AMSOIL 0W-30 MS 100% Synthetic European Motor Oil | EOTQT-EA |
Coolant & Antifreeze
| Product Name | Part Code |
|---|---|
| AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
Automatic Transmission & Transfer Case Fluid
| Product Name | Part Code |
|---|---|
| AMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF | ATLPK-EA |
| AMSOIL OE Fuel-Efficient 100% Synthetic ATF | OTLQT-EA |
Brake Fluid
| Product Name | Part Code |
|---|---|
| AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid | BFLVCN-EA |
Engine Oil Viscosity Options
| Condition | Viscosity |
|---|---|
| All Temperatures | 0W-30, 0W-40 |
| Above -25°C | 5W-30, 5W-40, 5W-50 |
Engine Oil Specifications & Details
| Detail | Value |
|---|---|
| AMSOIL Lookup Oil Grade | SEO59 |
| Oil Capacity (with filter) | 6.9 quarts |
| Oil Drain Plug Torque | 22 ft/lbs |
Note: After refilling, always check the oil level.
Automatic Transmission and Transfer Case Specifications
The transmission requirements for this vehicle vary based on the datacard code (A89) present in your specific vehicle. It is critical to identify whether you have a Reduced-Friction setup.
Transmission Fluid Identification
| Condition | Fluid Color |
|---|---|
| With A89 Code (Reduced-Friction) | Blue |
| Without A89 Code | Red |
Transmission Capacity
| Component | Capacity (Total Fill) |
|---|---|
| 7-speed 722.965 Transmission | 10.2 quarts |
Transfer Case Lubricant
| Component | Capacity (Front) |
|---|---|
| Transfer Case | 1.3 pints |
For the transfer case, the AMSOIL lookup lists ATLPK-EA or OTLQT-EA depending on the specific application requirements.
Coolant and Brake Fluid Specifications
Proper cooling and braking performance are essential for diesel luxury SUVs. Ensure you use the correct formulation to protect gaskets, hoses, and ABS components.
Coolant Details
| Detail | Value |
|---|---|
| Capacity | 10.4 quarts |
| Formulation Note | Concentrated (requires mixing with distilled/high-quality water) or 50/50 Pre-mix |
Brake Fluid Requirements
The AMSOIL lookup note references DOT 4 plus, 0009895605090109 (previously 0009895605110111 or 000989080701), or products approved on MB Sheet 331.0 for this application.
Common diesel oil-related concerns and how AMSOIL products may help
Diesel engines like the OM651 present unique maintenance challenges, particularly regarding emissions and soot management.
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Emissions System Health | BlueTEC systems rely on clean operation to manage NOx. | EOTQT-EA | Designed to provide protection without harming emissions systems. | Does not repair existing damage. |
| Extreme Temperatures | Cold starts or high heat can stress the engine and transmission. | ATLPK-EA | Remains fluid in sub-zero temperatures and withstands heavy towing. | Requires proper application. |
| Cooling System Corrosion | Diesel engines run hot; metal/gasket protection is vital. | ANTPC1G-EA | Protects all cooling system metals, gaskets, and hoses. | Must follow mixing instructions. |
Diesel maintenance notes for this vehicle
- Emissions Hardware: Monitoring Diesel Exhaust Fluid (DEF/AdBlue) levels is critical for the BlueTEC SCR system.
- Fuel Quality: High-quality diesel is necessary to protect common rail direct injection components.
- Particulate Management: Be aware of Diesel Particulate Filter (DPF) regeneration cycles.
Common maintenance concerns for this vehicle
Based on technical research, owners should monitor the following areas:
- Emissions Aftertreatment: The BlueTEC system is complex; ensure the SCR and DPF are functioning correctly.
- Oil Leaks: Monitor the area around the chain tensioner gasket for potential leaks.
- Steering Components: Ensure steering coupling connections are secure.
Recall, TSB, and manufacturer communication notes
NHTSA research has identified the following recall information for the 2014 Mercedes Benz GLK250:
- Steering Recall (Campaign 17V252000): The steering coupling connecting bolt may have been insufficiently tightened, which could lead to a loss of steering.
- Engine/Cooling Recall (Campaign 14V762000): Oil may leak from around the chain tensioner gasket area, potentially creating a fire risk if it drips onto hot engine surfaces.
Disclaimer: Always verify open recalls by checking your specific VIN through Mercedes-Benz customer service or the NHTSA website.
About this vehicle
The 2014 Mercedes-Benz GLK250 is equipped with a 2.1L inline-four cylinder diesel engine, identified by the engine code OM651. This vehicle utilizes Mercedes-Benz’s BlueTEC technology, which is a specialized suite of emissions control systems designed to reduce nitrogen oxide (NOx) output.
The OM651 engine belongs to a lineage of Mercedes-Benz diesel engines that incorporate advanced NOx reduction technologies. The BlueTEC system typically employs Selective Catalytic Reduction (SCR) using Diesel Exhaust Fluid (DEF/AdBlue), alongside other components like particulate filters and NOx adsorbers (DeNOx). Because this vehicle relies on these complex chemical processes for emissions compliance, owners should be particularly attentive to the health of the exhaust aftertreatment system.
Maintenance for this diesel variant focuses heavily on the fuel system, turbocharger, and emissions hardware. Owners often research topics such as monitoring DEF levels, ensuring high-quality diesel to protect common rail direct injection components, and understanding Diesel Particulate Filter (DPF) regeneration cycles. It is important to note that specific technical specifications should always be verified against a dedicated service manual for the 2.1L OM651 variant.
Common questions about this vehicle’s diesel oil and maintenance
What is the engine oil capacity for my GLK250 diesel?
The capacity is 6.9 quarts when performing an oil change with a filter replacement. Always check the level after refilling.
Which viscosity should I use in cold weather?
For temperatures below -25°C, viscosities such as 0W-30 or 0W-40 are recommended by the AMSOIL lookup.
How do I know which transmission fluid my Mercedes needs?
You must check your datacard for the A89 code. If present, you have a Reduced-Friction setup requiring blue fluid; if not, you require red fluid. The 7-speed 722.965 transmission has a total fill capacity of 10.2 quarts.
What should I do about the engine oil leak recall?
If your vehicle is part of campaign 14V762000, Mercedes will replace the chain tensioner gasket free of charge. Contact MBUSA at 1-800-367-6372 to verify.
Does AMSOIL provide a solution for BlueTEC emissions concerns?
While no fluid can repair hardware, EOTQT-EA is designed to provide exceptional engine protection without harming emissions systems.
Can I use any antifreeze in my GLK250?
No. The AMSOIL lookup note references specific requirements (such as MB Sheet 331.0 or DOT 4 plus) for this application. Using incorrect coolant can damage gaskets and hoses.
Verification Disclaimer: While this information is derived from available technical data, always consult your owner’s manual or a certified professional to confirm specifications for your specific VIN.