Years back I just did what I wanted and to heck with the landlord.
What are they going to do, throw you out? Your paying the rent on time, and nice and quiet. Heck we had drunken bums throwing partys in our unit and the police would have to come to deal with it and the landlord and management wouldnt toss them, but would get upset over some one washing their car????
I used to wash my cars once a weak, used my own hose and did it near the dumpster. So they took the spigot handle off to deter that

, no problem I went to the hardware store and bought one.
Oh, the local drunk in our building was so hammered he came back from a party one night and tried to get into the unit next door(all buildings looked the same, he was too hammered to notice

and his key wouldnt work to get into the stair well. So he tried to climb up the side of the building into "his" unit on the first floor, and ripped all the siding off and the cops had to come. SO they finally evicted him but took 6 months before the Peoples Republic of Massachusetts finally gave the OK to ditch him. Landlords in MA are considered to be the bad guys in the courts and the non-paying deadbeats are the 'Victims"; so it takes quite a while before anyone can be eveicted, in the mean time they can trash your building and good luck getting any money from the layabouts.
Anyway per the cars, their was a two year old 86 Honda Civic a guy owned, it snapped a timeing belt and grenaded the engine. He got estimates to fix it and said to heck with it and just abandoned it in the lot when he moved out LOL The property magager wasnt happy since they couldn't just have it halled off without a Title, they had to deal with the idots at the Mass registry and that took like a year before they could have hauled off to the crusher LOL