that means what car are you driving

Since your car was reg. in mar 2000, your parf rebate when you scrape your car will be your omv*120%. you can find out the omv value of your car in the log card.
Suppose you scrape in Sept, your coe will still have 4.5 yrs, scrape value of your car can be calculated by :
scrape value now = (omv x 1.2) + 17.5k[coe paid x 4.5/10 yrs]
take an omv of 14k, then scrape value now will be abt 34.3k
by the tenth yr, your parf rebate will be left with 14k * 80% = 11.2k [coe zero]
annual dep. will be abt (34.3 - 11.2)k / 4.5yrs = 5.1k
if you can sell yr car higher than 34.3k now, then your dep will be even higher if you keep your current ride.
if i am not wrong, annual dep. of a new vois is slightly less than 5k now (thats if you spread it over 10yrs), so i think you can consider changing. I think the waiting time for vois is about 3 mths now.