Mercedes-Benz Oil Change DIY M112 M113 V6 V8 Engines

In this tutorial, you will learn how to change oil and oil filter on Mercedes-Benz M113 and M112 engines. This is one of the most common engines used on almost all Mercedes classes from 1997-2007. The M113 engine is a V8 and often is recognized as 430 or 500 model. It is found on E, C, CLK, SL, CL, R, ML, GL, G classes. The M112 is almost identical but with smaller displacement and two fewer cylinders. The instructions are the same for both engines with one exception. The oil capacity for the V8 and V6 engines is different. Check oil capacities in the next section. A complete list of applications is found at the end of the tutorial. 

1. What you will need

• 0W-40 Synthetic Oil¹
  • Recommended Modil1 0W-40
  • Castrol 0W-40 Full Synthetic
  • Royal Purple SAE 0W-40 High-Performance Synthetic Motor Oil
• Oil Filter^{2
  Fleece oil filter should be used for 10,000 oil change intervals.}  
  • Genuine Mercedes-Benz Oil Filter
  • Mercedes MANN OEM HU 718 Oil Filter
  • Mobil 1 Performance M1C253 Oil Filter
• Oil Filter Wrench
• Tools³
  • 13mm socket
  • 10mm socket
  • Screwdriver
  • Ratchet

Notes: 

1. V8 models including 430 and 500 require 8-8.5 litter (quart). 
   V6 models including 240 and 320 require 7-7.5 litter(quart).
2. Make sure you install a quality filter. Fleece is recommended. Cheap oil filters degrade quickly and are not able to filter debris for 10,000 miles.
3. We assume you have basic tools. If you don't read this article that will help you choose an automotive toolset. 

2. Instructions

Step 1: Raise Vehicle

In this tutorial, we are using ramps to jack up the car. Drive your Mercedes-Benz on ramps. Place the car in park and set the parking brakes. Block the rear tires of your Mercedes-Benz. Make sure to place jack stands under the car.

Step 2: Remove engine splash shield

Remove the plastic shield from the engine. It is held in place with eight 10mm bolts. Some models use 8mm screws or plastic retainers. 

Watch the following video on how to remove engine undercover (under shield).

Step 3: Locate oil drain plug

Here is a close up picture of oil drain plug on this Mercedes-Benz. Some models have the bolts in the middle of the pan towards the rear. Regardless of the location, the drain bolt is always going to be at the bottom of the oil pan. It requires a 13mm socket. Be careful with the direction. It is easy to get confused when working under the engine. 

Step 4: Drain Oil

Remove oil drain plug. Allow the old oil to drain for at least 10 minutes or until there is no more oil dripping from the oil pan. 

Watch a video to learn how to perform this step.

Step 5: Replace drain plug washer

Replace the drain plug washer if you have one. If your oil filter didn't come with a new washer it is better to reinstall the old washer than install the drain plug without a washer. If you install the drain plug without a washer it will leak oil. Reinstall the oil drain plug.

Step 6: Install drain plug

Reinstall the drain plug on Mercedes M112 M113 engine.

Watch a video on how to perform this step.

Step 7: Locate engine oil filter

Locate the engine filer on top of the engine of your Mercedes-Benz. Use a filter wrench to remove the oil filter.

Step 8: Replace oil filter

Remove the old oil filter. Install the new filter on your M112 M113 and tighten it by hand. Lastly, torque to 25Nm.

Watch a video to learn how to perform this step.

Step 9: Locate oil filler cap

Locate the oil filler on top of your Mercedes engine.

Step 10: Add engine oil

Add the recommended engine oil. Check the oil level after you add 80% of the oil capacity. Add oil as necessary to bring the level between the MIN and MAX marks on the dipstick. Don't fill the engine with oil above the maximum mark on the dipstick.

Watch a video on how to perform this step.

Step 11: Check Engine Oil Level

Locate the oil dipstick. If your Mercedes-Benz doesn't have a dipstick, you will need to check the oil level via the instrument cluster.

Watch a video on how to check engine oil level via dipstick.

3. Applications