Maroondah and mecu merge 29 May 2009 4:47PM The board of Maroondah Credit Union yesterday said it recommended to its members that it merge with mecu, the expansionary credit union also based in Melbourne's eastern suburbs.Maroondah is a minnow with only $100 million in receivables.mecu has assets of around $2.2 billion and $220 million in capital following its merger with RegionalOne, a credit union based in northern Victoria.mecu has created one of Australia's largest and strongest credit unions, with 30 branches located throughout the country and around 300 staff.