I have a 1995 E420 SE.. Did'nt know what made it special but now I know..
I have the phone (useless now) the chrome door sills are nice and the heated seats are great.. I don;t know if it's got the self leveling system or not.
I'll have to check..

Overall the car is great.. I put a new ECU chip and K&N filters.
runs like a scalded dog.. (No I would not scald a dog)..
but my car is tops.. not much on the road that will hang with it or get the MPG's for a V8..

Just wanted to add my 2cent worth..

I didn't know my E420 was an "SE" until I got my insurance papers where the vin is listed as being a special edition. if does have a phone (even a panel above the rear view mirror), heated seats. never particularly noticed the sill plates and I'm sure is does not have load leveling. My 95 E320 wagon does obviously.