Up for sale is a genuine Nachi heavy-duty ball bearing for the AMG Mercedes M113 (supercharger/kompressor) motor found in the Mercedes C230 and SLK230. Bearing size is 30 mm (inner diameter), 47 mm (outer diameter) and 22 mm (thickness). This is a genuine Nachi bearing (not a rebadged "Nachi Quest" bearing that others are selling). It is made in Japan and guaranteed authentic. When choosing a bearing for automotive use, you don't want to use cheap, low quality, no-name brands or counterfeit bearings as their use could endanger property or lives. Nachi is a trusted brand/manufacturer of quality bearings that meet or exceed OEM specifications.
Reference Nachi 30BG04S13-2DST2 (replacement part for part numbers 30BG04S13DST2, 30BD4722).