Appreciate the input. I'll most likely tear open the diff, take some pics, and record part #s on the gearset.

EDIT:
Personal experience tells me an 04 c32 diff I had at one point was extremely similar to the 210 diff I have pictured. Size and design. Didn't tear unit open tho to compare.

As for the SRT8, I've got that information from a guy who works at a speedshop in Chicago, and has swapped several SRT8 differentials (Charger specifically I believe), and claims that it matches perfectly with what I present. Considering he wedged a c32 engine into an original c240 4-matic car (and retained the 4-matic), I take his word on things ;-)

No less, I still appreciate the input.

EDIT:
Ive got one report of a c55 guy using the QDF9V, while a c32 guy using the 7v.

Confused!

Anyone use a Wavetrac?

https://www.ebay.com/itm/Wavetrac-Differential-for-MERCEDES-210-axle-W124-E500-500E-R129-500SL-90-92-/263737897419?_trksid=p2385738.m4383.l4275.c10

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1994 E320 Coupe:

Yep, have a Wavetrac in one of my cars. Works great.

Tip for any Wavetrac or Quaife: Use gear oil without friction modifiers. This can be difficult to find, Wavetrac recommends Motul Gear 300 which is a little spendy at $18/liter but works fantastic. And it's very low viscosity at room temp, so it pours like motor oil. P/N 100118 for 75W-90.
https://www.jegs.com/i/Moser-Engineering/718/MOT-100118/10002/-1

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