There is a website called evilution It goes over many smart car maintenance and known concerns even for my 2009 smart car for two passion. Get oil changed, tires are low cost to change. Gas is great 40 mpg. One Achilles of the car is the clutch actuator, but it isn’t broke it just needs to be cleaned and lubed with new gear grease not spray which only is a temporary fix.park car on ramps in park, make sure extension arm on actuator isn’t engaged (park position) , spray paint three bolts to try to put back in same position which in park should be snug against clutch plate in clutch housing , disconnect negative battery terminal, gently unsnap sensor and unscrew three bolts and remove actuator, remove and cleans rubber boot with soap water, cover sensor port so don’t get wet with towel, take apart actuator using hex screwdriver or star screwdriver, brake cleaner let dry, the. spray some white lithium oil in actuator generously , then apply generous gear lube in the drywall gun tube everywhere , hex actuator back together, lube tip clutch plate contact arm that makes contact with clutch plate in clutch housing, put rubber boot back on, screw back in same position snug against clutch plate for resistance to start, screw three bolts , connect sensor, connect negative terminal battery, start up will get wrench symbol till resets, move forward and back and check see it gears are shifting by moving a little, may not start make sure push arm to have snug tension of actuator extension arm on clutch plate in housing , without this tension may not start. Resistance or tension is required to start so tip must contact clutch plate. Note: if arm is extended when removed the spring will shoot it out and to start it you need to get tip shrunk from extended position which would can only do by starting car but you can’t start it because actuator does not fit back in position if extended and resistance extension is not recognized. so one person must attempting to start car while 2nd person connects sensor and doesn’t bolt three bolts in but holds actuator in hand and 2nd person under car pushes actuator against tip to simulate EXACT resistance tensiOn on extended arm to start, you are guessing on force, I used brick to push squeeze arm in corner squeezing tip into solid metal by pushing tip in corner then at same time have other person try to start car, guessing how much force it takes, , you have to replicate the exact tension of plate in housing to get car to start and extension arm to shrink to park position, once car starts th not will go to shrunk position and fit in park position in default position , used park brake , hold brakes on start for safety of second person, took like 40 tries and a dead battery from failed starts but will start then let run until it shrinks arm, once arm is shrunk then install in snug position or position spray painted before removed. Also, Spark plugs I unscrew and use snug rubber house to pull out from tight fit, oil changed at shop, check tires once a month, check fluids , battery is under passengers foot carpet, engine is in back hatch just lift carpet, some fluids in front engine, rear tail lights easy to replace just pinch lose. Two complains: seat do not extend back to lay back and take a nap after a long day, car is loud on highway noise but keeps up, other notes car makes a whine noise on start up for 30 seconds or 90 seconds seems normal. Gas mileage great, which could put bigger tires on for a farm or rough country roads but can cut plastic away from tire well I guess. Low tire center on f gravity is okay but need farm option. Mercedes dealership is a stealership but smart car forums, rock auto parts, and website evilution is great to do it yourself . Plastic exterior is forgiving on dents, use 3m to remove glue, use stickers to cover any blemishes.paint holds well since plastic.