If the lease doesn’t say anything about working on your vehicle, then you need to consider the body corporate rules if your covered by one… If that doesn’t say anything then you need to consider what the council says.
The problem isn’t just working on your car as the lease/body corporate/council may have rules around noise, disturbances and such. For example, where I live, you can’t sit and idle a car for 1/2 an hour to warm up your car in the owning since the council rules state you must start and promptly drive off to reduce disturbances to your neighbours.
Check all the rules and then make sure you aren’t flagrantly breaking them (working on your car until the sun goes down banging on things generally will have you breaking noise rules).
Try and find out who is complaining and have a friendly talk to them. They could be doing shift work and your banging makes it hard for them to sleep or they could be asthmatic and petrol fumes make it hard for them to breath when the wind blows in a particular direction.
If you’re being reasonable and looking after the amenity of your surrounds (noise, fumes, etc) and your not disruptive to your neigbours (burnouts or racing the engine as you take off to work at 6am every morning) and your following the rules, then you should be ok to ignore such whining..
Just be cautious that your lease may have clauses around “disturbance” so as you live in a residential area, house mates work8ng on their cars at the same time does have the same characteristics as a workshop so that may put you in a difficult place should you continue…
Maybe don’t work on two cars at the same time and don’t work until sundown would be my advice.
Alternatively buy a small farm further out of the city and you can do almost anything you want. And when suburbia reaches you in 30 years, you can subdivide and retire rather wealthy
So this complain5 may be a blessing in disguise