The G-cabriolet is extremely rare period. production numbers for the more modern 463 chassis are as follows; The total of 463 Cabrios made until the end of 2003(starting in 1989) is as follows:
200GE/G200 20
230GE/G230 82
G500/G55AMG 213
300GE/G300 266
G320/G36AMG 145
G320 154
G320-MY01 50
G500-MY01 98
350GDT/G350DT 160
250GD 14
300GD/G300D 155
G300DT 157
G400CDI 177
Total 1691
Now MOST of those models were never imported here at all. The approximate number of newer style G-cabs in the US is 65. That is per the previous importer Europa Intl. They brought in the vast majority of G's. It is a painfully expensive and difficult process to bring one in grey market. There are some for sale by Europa in Santa Fe NM, including a new one for $140k. There are a few used ones in San Jose CA,
www.keisermotors.com
I do think that if you count all of the G-cabs from '79 on that made it here, you might hit 100 units. Considering that until 2002, there had only been 1100 G's imported here period, that seems like a very reasonable figure to me. It is a shame that MBUSA didn't choose to bring the SWB or the Cab version in. Of course by most accounts they completely botched the take-over of G sales anyway, so maybe it was for the best.