They add fuel tanks which increase fuel capacity from 10,000 kg to 14,000 kg as described here:
https://www.google.com/url?sa=t&rct=...8EXhbumRB3qGhQ
It still doesn't have enough range to go CPT HLE with island reserves. It would have to make a fuel stop at Walvis Bay WVB and then carry only about 70 passengers of the 112 capacity. It's advantage is that it can land with a 15 kt tailwind instead of the usual 10. It's disadvantage is that it doesn't have reversers.