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Pelican Technical Article:

Oil and Filter Change

Steve Vernon

Time:

1 hour1 hr

Tab:

$60 to $200

Talent:

*

Tools:

Oil filter removal tool, 13mm wrench, 8mm socket, floor jack, jack stands, wheel chocks, safety glasses, torque wrench

Applicable Models:

Mercedes-Benz C350 (2007-14)
Mercedes-Benz CLK350 (2006-09)
Mercedes-Benz E350 (2006-14)
Mercedes-Benz GLK350 (2010-12)
Mercedes-Benz ML350 (2006-14)
Mercedes-Benz R350 (2006-12)
Mercedes-Benz SLK350 (2005-14)

Parts Required:

Oil and Filter

Hot Tip:

Get the engine warm before you drain the oil

Performance Gain:

Longer engine life

Complementary Modification:

Flush your cooling system

One of the most common tasks to perform is replacing your engine oil. Frequent oil changes are perhaps the most important procedure you can do to maintain and prolong the life of your engine. With the better oils that are available today, the requirement for frequent changes is diminishing. Even though Mercedes Benz recommends oil change intervals that are much further apart than in the past, I usually recommend that you keep the changes under the 5,000-mile limit. If you don't drive your car too often, you should change the oil at least once a year to keep things fresh.

The first thing you need to do is to make sure that you have everything that is required for the job. Nothing is more frustrating than emptying your oil, only to find out that you don't have a replacement filter or enough oil. You will need an oil filter kit, a 13mm wrench, an oil filter housing socket, a new drain plug and crush washer, a roll of paper towels, a very large oil pan or bucket, and nine liters of oil. Start by driving the car around, and let it heat up to operating temperature. You'll want to empty your oil when it's hot, because the heat makes the oil flow a lot easier, and more particles of metal and dirt will come out when the oil is emptied.

Next safely jack up and support your car.

Open the hood and remove the front engine cover by pulling it straight up and off from the front (red arrow).
Figure 1

Open the hood and remove the front engine cover by pulling it straight up and off from the front (red arrow).

With the cover off you have access to the oil filter (yellow arrow).
Figure 2

With the cover off you have access to the oil filter (yellow arrow). Note: you can fill the engine through the oiler filler cap (red arrow) with the cover on or off.

With the vehicle safely lifted and supported remove the rear engine/transmission cover by removing the six 8mm bolts (red and yellow arrows).
Figure 3

With the vehicle safely lifted and supported remove the rear engine/transmission cover by removing the six 8mm bolts (red and yellow arrows). The forward bolts also help hold the middle engine tray in place (yellow arrows).

Use a 13mm socket and remove the drain plug and crush washer (red arrow).
Figure 4

Use a 13mm socket and remove the drain plug and crush washer (red arrow). This bolt does not need a lot of toque but for some reason people really tend to over tighten the drain plug. Use care, as the oil should be quite warm.

The flow of the oil will change as it starts to empty so don't just put your drain pan underneath and walk away.
Figure 5

The flow of the oil will change as it starts to empty so don't just put your drain pan underneath and walk away.

When all the oil has drained install a new drain bolt and crush washer and torque to spec.
Figure 6

When all the oil has drained install a new drain bolt and crush washer and torque to spec.

Figure 7

Move back to the top of the vehicle and use an oil filter removal tool to remove the plastic top of the oil filter

Use care when removing the top and filter.
Figure 8

Use care when removing the top and filter. Even though you have drained the oil there will still be oil in the filter.

Here is the oil filter lid with the old filter off.
Figure 9

Here is the oil filter lid with the old filter off. To remove the old filter just grasp it and pull it straight down and off. Inspect the filter for debris and metal. The oil filter kit includes the new filter along with new O-rings. Note: some kits contain more O-rings than you need as they are for a broad range of applications so do not worry if you have left over O-rings.

Use a pick or small flathead screwdriver and remove the old O-rings from the filter housing (red arrow).
Figure 10

Use a pick or small flathead screwdriver and remove the old O-rings from the filter housing (red arrow).

Install the new O-rings (yellow arrows) and filter pushing firmly down on the filter until it seats in place.
Figure 11

Install the new O-rings (yellow arrows) and filter pushing firmly down on the filter until it seats in place. There should be a good seal along the bottom of the filter and the housing (red arrow).

Here is a trick: the oil fill cap is not that big so pour the first eight liters of oil in through the oil filter housing before installing the new filter.
Figure 12

Here is a trick: the oil fill cap is not that big so pour the first eight liters of oil in through the oil filter housing before installing the new filter. Then install the filter and tighten. Once everything is tightened up run the motor for a few minutes. Then shut it off and let the oil settle back to the bottom of the pan.

Check the level and top it as needed through the oil filler cap opening (red arrow).
Figure 13

Check the level and top it as needed through the oil filler cap opening (red arrow). Congratulations, you just saved a bunch of money.

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Comments and Suggestions:
Omar S. Comments: What a great tip to refill the oil through the oil filter housing... Thank you very much. That would even allow for a better way to hold the oil container upside down as it drains the last few drops of oil in.

Here is one more... Looking through images of the list of oil filters Pelican carries for the W204 model all show that they come with several o-rings. You made it clear where 3 of the typically 5 o-rings are used to replace older ones on the oil filter cap/holder. One of the leftover ones, should be used to replace the o-ring that is located on the top/handle part of the engine oil dip stick to help keep that part sealed properly.
March 23, 2016
  Followup from the Pelican Staff: Thanks for the additional info and feedback. We appreciate it.
- Nick at Pelican Parts
 

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