The 3 part numbers I find online for the Garmin card are:
205-820-48-00 (without code 355)
213-906-27-04 this is listed as version 5.2 (says with code 355, EV5)
218-906-60-02 this is listed as version 6.0 (says with code 522)
On some of the parts sites if you plug in a 2016 GLC300, it recommends the first "205" part number. The last two part numbers ("213" & "218") are common on eBay. Descriptions vary on whether they work with the GLC300.
205-820-48-00 (without code 355)
213-906-27-04 this is listed as version 5.2 (says with code 355, EV5)
218-906-60-02 this is listed as version 6.0 (says with code 522)
On some of the parts sites if you plug in a 2016 GLC300, it recommends the first "205" part number. The last two part numbers ("213" & "218") are common on eBay. Descriptions vary on whether they work with the GLC300.