Yeah, if it's anything like on a '84 300D (different car, I know, but still pretty similar I think) it is pretty straight forward.
However, might I suggest putting an extra backup underneath the engine, just in case? An extra jack stand perhaps, positioned right next to the jack?
I did it with the engine only on a jack as well, but thinking back on it: if my jack would have failed right as I had my hands in a wrong place, I might be writing this post with one hand. If the engine comes down at the wrong time, the results can be...well, pretty painful, I imagine.

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"The MB W123 is so bulletproof, you can drive them forever. Which is a good thing as it takes that long to get anywhere."
Betsie: 1984 W123 300D (hobby, 280k miles)
Myrla: 2001 Mazda Protege 2.0 ES 5spd (daily driver, 130k miles)
The Turd: 2007 Toyota Camry (wife's car, 118k miles)