Change oil in w126
 

My engine is different than the other 126's and I would like to know how is the proper way to change the oil in my 126. I am not sure when it was last changed and I am taking a big risk in not changing it yet.

So.. I would like to know what filter I should purchase, and tools required. Then I would like to know where the oil filter actually is located. And how I take care of the old oil, as in... how do I remove it. Is there a plug somewhere on the bottom that drains it all out? or what? I did a search on the topic but found an article on changing the oil in a different engine.

thank you

The oil filter is in the back of the engine close to the firewall. It is somewhat buried. You can buy a "socket" from the dealer that will help removing it.

I only use Mercedes oil filters. The reason for this is actually from an old Toyota experience- I learned that Toyota oil filters have an integrated check valve which prevents oil from leaking down while the engine sits, not running. When the engine is first started there is almost instant oil pressure.

Now I don't know if this is true with Mercedes, I have never heard of this, but Mercedes has been known to change and update their filters and recommendations over the years. They obviously care about the longevity of their vehicles.

I have tried other filters but have kept coming back to the Mercedes ones. In a nutshell, I trust their filters.

To drain the oil, yes there is a drain plug a the very bottom of your engine. It will allow for almost a complete oil drain, which is good. You will notice that the drain plug has an washer. It is called a crush washer. It is to be used, new each time.

Coincidentally, your new Mercedes oil filter often comes with this washer.

Hope this helps,

Haasman

With the number and level of questions asked, Snibble, I would assume you are pulling our legs.

If not, you should go to the library.

Thanks, George, for saying what I've been thinking!

Snibble,

You can do it... it's the easiest thing. All you do is swap out the old filter with the new (new gasket too, which comes with the filter. And you unscrew that bolt at the bottom of the block, releasing all of the old oil. Then you rescrew the bolt in with it's new washer, and refill the crankcase with oil!

I was the same way you are... but once you do it, you'll realize how easy it is.

Good luck.,

At the risk of turning this into another Topsider pro/con thread...

Snibble, at least read what's in the archive on Topsiders and sucking rather than gravity draining the oil then make your own decision.

I bring this up because there's probably a plastic belly pan that has to come off to get to the sump drain plug.

Sixto
91 300SE
87 300SDL
83 300SD