VW G 052 190 A2 (TL 521 90) is a specification for manual transmission fluid. If you know that your manual gear box requires a VW TL 521 90 manual transmission fluid / gearbox oil, purchase online here.
Replacing your VW gearbox oil is usually a straightforward task, if you're reasonably handy. In fact, replacing gear oil is normally a very similar process to changing engine oil.
Running a high quality gear lubricant not only ensures smooth gear change but is vital for the protection of internal components and gear faces / teeth.
If you're unsure if Volkswagen TL 521 90 is correct for your application, or have a modified or unique Volkswagen vehicle feel free to get in touch for a custom gear oil recommendation.