Azezur Khan, known as Ronnie, had just left the service of his school friend in East Dulwich and was making his way to the burial when he was gunned down at around 3pm.
The Metropolitan Police said he was hit a number of times in an exchange of gunfire between Rocknells Place and Forest Hill Road.
A fresh appeal comes just days before the second anniversary of his death on November 3.
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A total of 1.7 million attacks were carried out against more than 650,000 victims of which just over 52,000 were in the UK.
The men were using ropes to lever the sofa up to the first floor apartment because it was too large to fit through the doors.
He's not even halfway.