The bodies of Christopher and Jennifer Early were discovered by local police in their Volvo following the robbery.
The couple, aged 69 and 62, were murdered last Thursday at the property in the coastal resort of Hibberdene, detectives believe.
Identity documents showed they came originally from Britain but were understood to have moved to South Africa in the 1980s.
A police spokesman for the KwaZulu-Natal Province said the couple were attacked with a "blunt object".Full report
Hat Tip: Steve S