What kind of differential I have in 2000 E320 wagon? Opened or LSD?
I'm consider to change gear oil there, and thinking about use Redline Synthetic 75W90 as OEM substitute.

I know that Mercedes uses
85W-90 Part#000 989 28 03 (MB 235.0) for differential without ASD/LSD
and
85W-90 MB 235.7 Part#001 989 17 03 for diff with ADS/LSD.

What about Synthetic gear oils like Lucas 75W90, Mobil1 75W90, Redline 75W90?