I have personally had excellent results with aftermarket windshields.
I have heard complaints about inferior 'optical quality' from certain producers, but have never actually observed this problem.
Look for small print in the corners to see if you can determine the manufacturer.
Unless it was 'rebadged' with a MB logo, you may be able to request exactly the same OEM part from a glass installer.
It may not come with Daimler's signature on it, but you may save big $$$.
1986 300E 5-Speed 240k mi.