91-95 and 95-99 S600

[jcmbz]

I would like to know more about the engine part of the S600. I know there is some updates in the M120 engine as their number is different
91-95 M120.980
95-99 M120.982

So what changes mercedes has made?
Some said the 95-99 engine is more stable, but hard to tell because it is relatively new...

Thanks!

[pcmaher]

One major advantage is no distributors, caps, and rotors. Also has an improved fuel injection system, and engine component wiring more likely to be of the new non-disintegrating type.

I'm pretty sure this change occured for model year 96. I have a S600 built in 10/94 that is considered a 95 model year, and it has the 120.980 engine.