1984 300DT: New Bosh Oil Filter includes two washers, what to do?
 

Changing the oil, noticed the new Bosch Oil Filter includes two crush washers, one steel, one copper. Should I use both or just the copper?

Also, what are the torque values for the 13mm oil pan drain plug and the two 13mm bolts for the oil filter canister?

If the copper one fits only use that. If neither fit don't use either.

I don't know the torque for the drain nor the 2 oil filter housing nuts.

I use the copper washer against the pan and the steel as a friction washer on top of it. Torque the pan drain to 40 nm and the filter nuts to 25 nm per the FSM Maintenance Manual 1981 to 1993

Use the copper one and dispose of the other one.

I sat my torque wrench to 30 foot pounds (40 nm converts to about 30 foot pounds). I then placed the torque wrench on the 13mm oil pan bolt and began to turn the bolt. It seemed the torque wrench did not want to "click" signifying torque had been reached. I finally stopped because I was worried about stripping out the oil pan bolt.......

Torque specs for drain plug and filter housing = GutuenTight

that's what I went with; I sure didn't want to strip out the threads in the oil pan.......

Haven’t done the Benz yet but on my BMW E9 the filter kit comes with 2 washers also. I have been using one on the filter bolt the other on the drain plug.
Don’t know if that’s where it’s supposed to go but it seems to work.

The fact that an oil filter comes with multiple seals doesn't mean that you need to use all of them. In many cases, a particular filter fits a number of different applications with different seal requirements.

I use two fingers on the torque wrench handle as held.
Whatever your two finger leverage on the handle amounts to at fingers' stop,is good.
That is a general mechanic's hack.

No need to over tighten the drain plug washer.

I used to place the grey colored washer over the exterior face of the copper one until it leaked once (after many successful applications).
So I just use the copper crush washer,making sure to center it while tightening,then do the final tight is right.

Usually one copper washer fits the drain plug and the others go into my copper washer bin. Sometimes they give you O-rings for the filter shaft, but I have better Viton ones there. Always change the thick cover O-ring since the old one likely went flat. I save the old ones in a bag since often end up using them on another car for something non-sealing like a cushion or spacer. Insure you don't trap any wires or hoses under the cover (feel for them) or you will get a massive oil leak (how would I know?). Easy to do since they crowded a bunch of stuff around the top of the filter housing in my 1984 and 1985.