Did a read up online and here is what I got
"Let me first explain the Overtrade practice by dealers. It is introduced when the MAS regulation for a motor loan limit of up to 70% of the car price was in effect. A typical scenario was that the motorist wanted to trade in his old ride for a new one but the value of his old ride was not sufficient to match the downpayment.
Example:
Value of old ride = $10,000 (market value - outstanding loan balance)
Price of new ride = $70,000
Required downpayment = 30% x $70,000 = $21,000
Maximum loan amount = 70% x $70,000 = $49,000
Shortfall = $21,000 - $10,000 = $11,000
Overtrade amount = OT
In order to meet maximum 70% loan amount, 30% x (70,000 + OT) = 10,000 + OT
Solving the equation, OT = 15,715
Inflated price of new ride = $85,715
New downpayment = 30% x $85,715 = $25,715
Maximum loan amount = 70% x $85,715 = $60,000
Thus, the trade-in value for the old ride was increased to $25,715. The difference was that the buyer had to sign up a new motor loan of $60,000 instead of $49,000; no additional cash outlay was required.
Since MAS had relaxed the rule to allow for 100% loan, the Overtrade scheme has been used to help motorists with their current ride in negative equity."
So the 29k disc is actually a transference into your current loan?