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Changing Your Oil and Filter on your Mercedes
 
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Pelican Technical Article:

Changing Your Oil and Filter on your Mercedes

Steve Vernon

Time:

1 hour1 hr

Tab:

$40

Talent:

*

Tools:

Oil filter removal tool, 13mm wrench, 13mm socket, torque wrench

Applicable Models:

Mercedes-Benz W124 (1986-93)
Mercedes-Benz W201 (1984-93)

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 and replace your radiator hoses

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 torque wrench, a 13mm socket and wrench, an oil filter housing socket, a new drain plug, a roll of paper towels, a very large oil pan or bucket, and 7 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.

Safely jack the car up and place it on jack stands, please see our article on safely jacking up and supporting your car. Next, locate and remove the 13mm oil drain bolt on the oil pan. Keep in mind that the oil will be hot, so it's a good idea to wear a set of gloves and have plenty of paper towels on hand to clean up any oil that may spill. Inside the engine compartment, remove the oil filler cap on the top of the valve cover and let the oil drain from the engine completely. This may take awhile depending on the temperature of the oil. Once fully drained, re-fit the oil drain bolt and torque it to 25 Nm (18ft/lbs.).

From inside the engine compartment, locate the oil filter housing at the rear of the rear of the engine. You'll see it just in between the firewall and the intake manifold. You will need a special socket in order to loosen and remove the filter housing cover. This tool is available from Pelican Parts. You'll need to use a ratchet with extension to reach the oil filter housing. Unscrew and remove the filter.

Use a little of the new oil you are about to put into the engine to lubricate the rubber O-ring on the new filter. Just dab your finger in and put a light coating on the ring. Install the new filter and torque to 20 Nm (15ft/lbs).

Fill your engine with the new oil from the oil filler hole in the top of the valve cover. Add about 5 quarts to the engine, and check the dipstick. Continue to add about a half a quart at a time and keep checking the dipstick. Fill it up until it reaches the top mark of the dipstick - the engine oil level will automatically lower when the oil filter fills up with oil. Don't forget to put the oil filler cap back on the top of the valve cover.

With the car safely supported on jack stands remove the 13mm drain plug from the bottom of the sump.
Figure 1

With the car safely supported on jack stands remove the 13mm drain plug from the bottom of the sump. Always dispose used motor oil according to the regulations where you live. Most oil change shops or your neighborhood parts store will take your old oil and filter to be recycled properly.

Locate the oil filter towards the rear of the engine and remove with your oil filter removal tool.
Figure 2

Locate the oil filter towards the rear of the engine and remove with your oil filter removal tool.

Use a little of your new oil to lubricate the rubber seal on the new filter.
Figure 3

Use a little of your new oil to lubricate the rubber seal on the new filter.

With the drain plug and new filter installed add five quarts of oil.
Figure 4

With the drain plug and new filter installed add five quarts of oil. Give the oil a moment to get to the sump and then check the dip stick for level. Don't forget the new filter will take up some of the oil once you start the car.

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Comments and Suggestions:
Bramwell Comments: Can the oil pressure go down if you need to change oil ? My pressure go down from 3 to below 2 when the car heats up its a190e benz
November 23, 2016
  Followup from the Pelican Staff: No. I would check oil pressure using a gauge. You could have an issue. - Nick at Pelican Parts  
Chris Comments: Is this accurate for the 2.3-8 as well? The intake filter has to come off?
April 3, 2016
  Followup from the Pelican Staff: What year and model vehicle do you have?


Applicable Models:


Mercedes-Benz W124 (1986-93)
Mercedes-Benz W201 (1984-93) - Nick at Pelican Parts
 
mahmoud Comments: Tank you , I am from iran , shiraz city neyriz
October 25, 2015
  Followup from the Pelican Staff: No problem. Glad to help. - Nick at Pelican Parts  
quesnoy Comments: Thanks, Nick. I tried a three jaw wrench. I couldn't get it to grip. It just kept spinning before getting tight enough to grip. Anyways, the Hazet wrench worked perfectly. I was able to get the oil and filter changed. Now, on to the coolant.
January 16, 2015
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
quesnoy Comments: Hi Nick. I'm halfway through with changing my oil, and I discover that the previous owner torqued the oil filter on so tight, I've already snapped one relatively cheap cap wrench. I just ordered the Hazet cap wrench from the Pelican tools section. It seams to be a much more heavy duty cap wrench than others I've used. Hopefully it won't break like the other one. Do you have any tips on removing oil filters that are over-torqued or otherwise stuck on? Also, to loosen, you turn counter clockwise, correct?
January 11, 2015
  Followup from the Pelican Staff: Once over tightened, I prefer to use a 3-jaw oil filter wrench. The wrench will continue to grab the filter as it compresses, until it breaks free. - Nick at Pelican Parts  

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Page last updated: Wed 12/7/2016 02:24:53 AM