An elderly couple from Melbourne's southeast has been declared missing after failing to show up for a prearranged medical appointment.
There has not been a confirmed sighting of Bentleigh couple Otto and Gerda, both 87, since they drove away from a Kings Way car park in their gold Lexus sedan on Tuesday night.
Otto, who has a heart condition, did not arrive for a scheduled procedure on Wednesday morning, prompting his family to raise the alarm.
Police and the octogenarian couple's family hold concerns for their welfare as both require ongoing medical treatment.
Daughter Sylvie said they both suffered short-term memory loss, although still regularly went out for dinner and to Crown Casino once a week.
She made an impassioned plea for her parents to contact her or the authorities.
"Mum, dad, if you can hear me, or if you are watching this, could you please, please give me a call, or call the police, or just notify someone," she told reporters on Wednesday afternoon.
"And if anyone has seen anything or has any information could they please contact the police."
Acting Senior Sergeant Rachel Shentzer said there was a possible sighting of the pair at a Mount Waverley petrol station on Wednesday morning.
Sylvie could not make contact with her parents on Tuesday and last spoke to them on Sunday.
"They were just their normal happy self," she said.
Otto is described as 180cm tall with balding white hair, blue eyes and a medium build, while Gerda is about 170cm tall with short curly white hair and blue eyes.
Anyone who sights the couple or their car - registration PYM-184 - can contact Moorabbin Police Station on 03 9556 6565.