The Coalition has made a final appeal to younger voters just six days out from election day, announcing a new loan scheme for first home buyers in its official campaign launch.

Key points: The PM was joined by his mother, wife and daughters at the Coalition's campaign launch in Melbourne

The PM was joined by his mother, wife and daughters at the Coalition's campaign launch in Melbourne He announced a few new policies including a first home buyers loan scheme that he said would allow people to get into the property market sooner

He announced a few new policies including a first home buyers loan scheme that he said would allow people to get into the property market sooner There was also a $53 million pledge for perinatal care, including money to go towards better support for pre- and post-natal depression

The Mother's Day launch in Melbourne also included a $53 million pledge for perinatal care, including $36 million to boost support for parents struggling with pre- and post-natal depression.

Prime Minister Scott Morrison was joined at the launch by his own mother and young family as well as the Coalition's front bench, but in contrast to the Labor campaign launch, the PM did the bulk of the talking himself, delivering a pitch directly to voters watching from home.

One of the new announcements in today's launch was the Coalition's commitment to helping first home buyers save for a deposit sooner by lowering the required deposit from about 20 per cent to 5 per cent.

Currently, if a prospective home owner cannot raise the industry-standard deposit, banks require them to take out mortgage insurance.

Scott Morrison was joined by his wife Jenny, his mother Marion and his daughters Abbey and Lily. ( ABC News: Adam Kennedy )

Under this scheme, eligible first home buyers would not have to pay mortgage insurance and instead, the Government would guarantee the difference between that lower deposit (down to 5 per cent) and the industry standard (about 20 per cent).

The full details of the scheme have not yet been released, but Mr Morrison said it was aimed at allowing people to get onto the property ladder sooner.

"It's hard to save for a deposit. Especially with the banks pulling back and larger deposits of 20 per cent now being standard. It is not getting easier," he said.

"We want to help make the dreams of first home buyers a reality.

"This will make a big difference. Cutting the time taken to save for a deposit by at least half and more."

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Watch Duration: 1 minute 47 seconds 1 m 47 s Scott Morrison makes first home buyers election pledge

He said Government support would stay in place for the life of the loan.

"This isn't free money. This scheme will be available to buyers with an income of up to $125,000 or a couple with $200,000, where they are both first home buyers," Mr Morrison said.

The Labor Party has responded by promising to match the Coalition proposal.

"We back genuine support for first home buyers — that's why we are also reforming negative gearing for future purchases, so young Australians don't have to keeping losing out to wealthy property speculators," Shadow Treasurer Chris Bowen said.

Earlier today, the Prime Minister announced $4 billion for Melbourne's shelved East West Link road project, even though the state Labor Government has ruled out its construction.

Reviving the East West Link is aimed particularly at voters in Liberal-held eastern suburbs seats including Deakin, Chisholm and Kooyong.

The Labor Party also began the day in Melbourne with a promise for the single-biggest federal investment in a public transport project in history, with $15 billion over 15 years.

That includes $5 billion towards the Airport Rail Link, which the Coalition had already allocated.

Both the PM and the Labor leader are expected to continue campaigning this week in marginal seats ahead of the federal election on Saturday.

Look back over the campaign launch in our live blog.