The sad thing is OEM seals from MB are NLA. If you can find OEM seals, they're probably NOS that's dry-rotted from sitting on a shelf for 30 years. I need to replace my rear seal on my 300SD at some point since the seal that's been on there about 20 years is showing some age and some rust needs repairing, and my options for an OE or OEM seal are slim to none.

I'm not knocking URO, but the one year return/complaint metrics don't tell us much about the durability of the product. You may have people who buy the URO seals and don't install them until over a year after they've purchased them, after the warranty period is over. The better question is 5-10 years later when the warranty period is over, how are they holding up? What is their long term durability like when compared to OEM seals?

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

FWIW ;

The original M-B replacement ones were very well made and came coated in paraffin to prevent degradation in storage....

I'd look on E-Bay.de for an N.O.S. one, I've used quite a few N.O.S. ones to very good effect .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better