The front are thick and black with the MB number part of the rubber. Nice quality.
The rears are much thinner rubber, shows crack lines and all white chalky stuff on them. There are numbers but are hard to read and it is lesser quality.
It depends on which option you selected. Some sites mention the brand name of the product they're selling which makes them popular to enthusiasts. Some sites offer multiple items with OE and OEM brands.
If you picked an OE (MB w/ star & P/N) item, you should get the same item. If you picked the same OE unit but an aftermarket or OEM (non MB per se) then you should return it for the correct item.
Do you have a link to the rear spring pad you purchased?
Is it strange that the white ish one has a 115... part number?
Rubber from a rubber tree is white. I'd be more concerned about fitment and proper part # rather than a little bit of white stuff on the thing. I've seen that on a bunch of stuff both automotive and non automotive.
Not so strange, I'm replacing all the fuel lines on a '86 560SL. It had part numbers from 114, 107, 123, and 126.
The white stuff is probably a mold release, or something to keep all those hot rubber parts from sticking together
when they come out of the press.
Both front and rear are OEM parts.
But the rear was put on a mercedes and returned.
That is why there is a nub missing on one of the donuts. That is why there is fine cracking on the rubber and slight discoloration. That is why the logo is hard to read and unevenly worn down.
Somebody puts a one nub donut shims on a mb and returns it. The MB dealership accept it back but it has been used. So some stuff from the car gets on the rubber and 20 or so years later it looks different than new.
This is not OEM new old stock. This is OEM somewhat used old stock.
This is not on the company i bought it from because they thought it was new.
it was a mistake of the mb dealership accepting slightly used parts back.
A lot of W123 parts have 115 numbers, because they are hand me down parts.
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