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Mercedes-Benz OM651 2.1L Diesel Engine Oil Change DIY

This article provides procedure on how to change the engine oil and filter on a Mercedes-Benz Engine OM651. The OM651 is a four-cylinder turbo diesel engine introduced in 2008 and comes as a 1.8L or 2.1L engine.

Mercedes-Benz OM651 2.1L Diesel Engine  Oil Change DIY
ESTIMATED TIME 30 mins - 1 hour
DIY COST $35-$70

The video and pictures are from a 2014 GLK250 BlueTec, but the procedure applies to other Mercedes-Benz models equipped with the OM651 engine. 

What you will need

List of tools and parts you will need to replace the engine oil on your Mercedes-Benz Engine OM651. 




  1. Jack up the vehicle. Drive the vehicle up on ramps or use a floor jack and place the transmission in Park.Mercedes GLK250 Diesel Oil Change DIYThen turn the ignition off and remove the key from the ignition. 
  2. Secure the vehicle with jack standsThe jack stands must support the vehicle frame. Do not place a jack stand under the engine or suspension components. SUPPORT VEHICLE


  3. Place wheel chocks behind the rear tires to prevent the vehicle from rolling, or you can also use a block if there are no available wheel chocks. Ensure parking brakes are engaged. Block rear tires
  4. Allow for the engine to cool down for at least fifteen minutes. If the engine is already cool, you can already continue to the next step. 
  5. Remove splash shield from under the engine. To remove the splash shield, you need a ratchet and socket to remove the 8mm eight bolts around it.remove engine under shild splash shield In some models, you have a combination of both screws and plastic retainers. Please remove all of them to drop the cover and have access to the oil drain bolt.  remove bolts from lower engine cover to access drain bolt to change oil
  6. Slide an oil drain pan and place it under the oil bolt. Check if the oil pan has the capacity to capture all of the engine oil. oil drain plan


  7. Use a 13mm wrench to remove the oil drain plug. location of engine oil drain boltLoosen the oil drain bolt by turning it counterclockwise. If removing the oil drain bolt is extremely difficult, you need to check that you are not turning the bolt in the wrong direction. 
  8. Drain engine oil. Be careful if the engine is still hot because the engine oil will be hot as well, and it can cause burns if it comes in contact with your skin.
    Carefully remove the oil drain plug and let the engine oil drain for several minutes.
  9. Replace copper washer. It is recommended to replace the copper washer every time you change the engine oil. Do not reinstall the drain plug without a copper washer. 

  10. Install Drain Plug. Initially, screw it by hand to avoid cross-threading. Use a torque wrench to tighten the drain plug to specification, and do not use a breaker bar to tighten the drain plug. See recommended torque be at the end of this guide. 
  11. Locate the engine oil filter and replace itoil filter and replace it. Use an oil wrench to remove the oil filter cartridge and keep an oil drain pan near the oil filter as oil may drip from the oil filter when you remove the oil filter cartridge. When removing the oil filter cartridge, just pull the old filter out and put the new one. Replace the o-rings on the filter cartridge as well.
  12. Put the engine oil filter back and use the oil wrench to seal it properly—torque to 25oil filter back and use the oil wrench to seal it properly—torque to 25Nm.

  13. Open the cover of the engine oil cap and add engine oil.

    Remove engine oil cap

    Use a funnel to pour in the engine oil and also prevent it from spilling.

    add oil via the engine oil filler hole
  14. Check engine oil level. If you had the engine running or just added oil to the engine, you should wait at least five minutes to take the next measurement. This will allow the engine oil to return to the oil pan so that you can take an accurate measurement. If the level is low, add one quart at a time, wait a few minutes, and recheck the engine oil level. checking engine oil level after changing the engine oil
  15. Reset oil service reminder on the instrument cluster.
  16. Inspect the engine for oil leaks from the drain plug and oil filter. 

Torque Specifications

One newton meter is equal to 0.7376 ft-lbs, rounded to 4 decimal places. To convert newton meters to foot-pounds, multiply your figure by 0.7376.

Applicable Oil Filters

  • Fram CH11277 replacement filters
  • Beck/Arnley 041-0867
  • CARQUEST 94026
  • CHAMP P1013
  • CHRYSLER 68091826AA
  • CHRYSLER 68091827AA
  • FIAT K68091826AA
  • FIAT K68091827AA
  • Fleetguard LF4000
  • HENGST E11HD204
  • JURA SO7217
  • Land Rover LR022896
  • MAHLE OX153-7D2
  • MAHLE OX153-7D2ECO
  • MANN & HUMMEL HU7010z
  • MANN & HUMMEL HU718-4Y
  • MERCEDES-BENZ 1121840425
  • MERCEDES-BENZ 6511080009
  • MERCEDES-BENZ 6511800109
  • MERCEDES-BENZ 6511800309
  • MERCEDES-BENZ 6511840025
  • NAPA 100026
  • Nissan 15209-HG00A
  • PUREPRO PL91013
  • Purolator L21405
  • ROVER LR022896
  • STP S11277
  • WARNER WP1013
  • Wix WL10026
  • Wix WL7470


Year Engine Model  
2012     OM 651.901 Mercedes Benz W176 180 CDI  
2011 - 2018 OM 651.901 Mercedes Benz W246 180 CDI  
2013 - 2018 OM651.901 Mercedes Benz C117 CLA 200 CDI  
2013     OM651.901 Mercedes Benz C117 CLA  
2011     OM651.901 Mercedes Benz W246 200 CDI  
2012     OM651.930 Mercedes Benz W176  
2007 - 2013 OM651.930 Mercedes Benz W204 200/220 CDI 4Matic  
2013     OM651.930 Mercedes Benz X156 GLA  
2013 - 2018 OM651.930 Mercedes Benz C117 CLA 220 CDI  
2014     OM651.930 Mercedes Benz C217/A217  
2011     OM651.930 Mercedes Benz W246 220 CDI  
2011 - 2015 OM651.980 (250 CDI) Mercedes Benz R172 SLK  
2011 - 2014 OM651.980 (250 CDI) Mercedes Benz W166 ML 250 CDI  
2016 - 2019 OM651.980 (250 CDI) Mercedes Benz SLC R172 250d  
2016     OM651.921 Mercedes Benz X253 GLC  
2014     OM651.921 Mercedes Benz C205/A205  
2009 - 2016 OM651.924 * (250CDI) Mercedes Benz W212 250 CDI BlueEff  
2009 - 2016 OM651.924 * (250CDI) Mercedes Benz W212 300D Hybrid  
2010 - 2013 OM651.913 Mercedes Benz W204 180 CDI  
2014 - 2016 OM651.950 Mercedes Benz W447  
2010 - 2014 OM651.940 Mercedes Benz W639  
2009 - 2016 OM651.925 (200CDi) Mercedes Benz W212 200 CDI BlueEff  
2008 - 2015 OM651.912(220CDi) Mercedes Benz X204 GLK 220 CDI BE  
2008 - 2015 OM651.912(250CDi) Mercedes Benz X204 GLK 250 CDI BE 4Matic  
2008 - 2015 OM651.912(200CDi) Mercedes Benz X204 GLK 200 CDI BE  
2009 - 2017 OM651.924 (250CDi) Mercedes Benz C207/A207  
2011     OM651.924 (250CDi) Mercedes Benz C218 CLS 250 CDI  
2008 - 2015 OM651.924 (250CDi) Mercedes Benz X204 GLK 220 CDI BE 4Matic  
2011 - 2014 OM651.911 (220CDi) Mercedes Benz C204 Coupé CDI  
2009 - 2013 OM651.911 (220CDi) Mercedes Benz W204 220 CDI  
2008 - 2013 OM651.911 (250CDi) Mercedes Benz W204 250 CDI  
2009 - 2017 OM651.911 (250CDi) Mercedes Benz C207/A207  
2011 - 2014 OM651.911 (250CDi) Mercedes Benz C204 Coupé CDI  
2009 - 2018 OM651.955 Mercedes Benz Sprinter  
2009 - 2016 OM651.924 (220CDi) Mercedes Benz W212 220 CDI BlueEff  
2015     OM651.921 (200d) Mercedes Benz W205 200d  
2015     OM651.921 (220d) Mercedes Benz W205 220d  
2012     OM651.921 (250d) Mercedes Benz W205 250d  
2009 - 2016 OM651.921 (250d) Mercedes Benz W212 250 CDI BlueEff


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  • Prolonged and repeated contact with mineral oil can result in dryness, irritation, and dermatitis.
  • Used engine oil contains potentially harmful contaminants which may cause skin cancer.
  • Wash your skin thoroughly with soap and water to remove any used engine oil. 

Frequently Asked Questions

What type of engine oil do I need?

The oil viscosity is usually printed on the oil cap. If it is not, then you need to find the owner's manual under the recommended fluids and lubricants section typically at the end of the owner's manual. 

  • at the oil cap
  • owner's manual
  • sticker by the top radiator support

Should I change the oil when the engine is hot or cold?

  • There is a lot of discussion on this topic of whether you should change the oil when the engine is hot or cold. Ideally, the oil should be slightly warm so it can flow easily but not burn you. 

How much does it cost to change the oil?

  • Anywhere from $19.99 to $150. A four-cylinder engine that takes 5w30 or 0w20, such as a Honda Civic or Ford Focus, will only cost you about $20. A Mercedes-Benz E-Class that takes 8.5L synthetic oil and fleece oil filter may cost as much as $150 at the dealer. Two of the main factors that play a role in engine oil cost are the oil type (synthetic, synthetic blend, conventional) and oil quantity required. Oil filter quality and how easy it is to remove may also play a role in the price of an oil change.

How often should I change engine oil?

Typical recommended intervals for most vehicles. 

  • Conventional Oil - Every 3,000 miles
  • Synthetic Blend - Every 5,000 miles
  • Synthetic Oil - Every 7500-10,000 miles (verify owner's manual)

Follow the recommended manufacturer intervals.

Can I change the engine oil at home?

  • Yes, you can. Follow this guide. We hope that once you go over all the steps, you will feel confident about the procedure to change the engine oil at home.

Can I change engine oil once a year?

  • While the age of oil can play a factor in the engine oil life, you need to pay closer attention to the miles driven. If you drive very little (under 5,000 miles) and use synthetic oil, you should be ok with changing the oil once a year.

Can I change engine oil but not filter?

  • Not recommended. You should change the oil filter at the same time that you change the engine oil. Oil filters do not last forever, and if not changed regularly, they will not filter the oil or, even worse, clog. In which case, the oil may bypass the oil filter altogether, which is a situation you don't want as you may shorten the life of the engine.

Is it necessary to change engine oil every year?

  • Yes. Most drivers should change the engine oil at least twice if not more per year, depending on the oil type and miles driven. If you put about 15,000 miles per year which is the national average in the US, you should change the engine oil at least twice per year. Assuming that you are using synthetic oil and a good oil filter. 

Should I change the engine oil before or after storing the car for long periods?

  • Change the engine oil if stored for over 6 months. Oil can lose its lubricating properties when sitting for an extended period of time. Change the engine oil if your car has been sitting for a long time.

What happens if I don't change the oil?

  • You are shortening the life of your car. Sludge may build up. The engine may start to knock. Most importantly, bearings will wear much faster. You may not notice any symptoms right away, but you are causing premature wear to your car engine.

How much oil do I need to add?

  • Check on your owner's manual. Every car has a different capacity. There is no correlation between the number of cylinders and oil capacity. Some 6 cylinder engines require only four quarts, while others may require eight quarts. Always check the owner's manual. You don't want to overfill or underfill.
Mercedes-Benz OM651 2.1L Diesel Engine Oil Change DIY This article provides procedure on how to change the engine oil and filter on a Mercedes-Benz Engine OM651. The OM651 is a four-cylinder turbo diesel engine introduced in 2008 and comes as a 1.8L or 2.1L engine.