I purchased two 2015 Smart Fortwo 451’s about a year ago off Facebook Marketplace because they both had one owner and had 6k & 9k miles respectively. I spent a 1/2 hour just trying to take the air filter out to check it, but decided to have Mercedes handle the service, since they offer vallet pickup/delivery. One car was for my girlfriend (who needed a 2nd car and had a golf cart stall). I have a two car garage, and my Harley Davidson fits in the front of my garage and my smart is 9’ long and fits behind it. I bought a new OEM navigation radio from eBay and wanted to have Mercedes install it since i tried to swap out my am/fm and the wiring harness was different. They charged me over $500 to swap out the radio (3 hours shop time). They also said that found a leak in the rear windows seal (which was $900 since they generally break the window when replacing it). They recommend $1,800 in level 3 service and windshield wipers (even though they has replaced filter, fluid and wipers just last july and had only driven the car 200 miles since last year). I also looked at having mercedes service put in an armrest ($900), cruise control ($2,200) and a glove box (instead of a shel $1,200). I didn’t have the armrest, cruse control, or glovebox install because of the dost, but also mercedes parts said they could mo longer get the parts since all of the Mercedes dealership seem to be selling all of their smart car accessories on eBay. I was lucky enough to find a used navigation faceplate on eBay or they could not have swapped out my radio. Although my girlfriend and I enjoy having a small 2nd car I, I have to prepare myself for the fact that if I am ever in an accident, my insurance adjuster is probably going to total my car since there are no parts available and the repair would be more then the blue book. In all of Colorado there is only one Mercedes Dealership that will even service a smart car. one of the cars was missing the spare key, and cost $250-$275 to reprogram a new one. The owner also lost the owners manuals and i found one new 2015 oem set on eBay for $250. I also made the mistake of buying reproduction passion rims off eBay to replace my Pure steel rims. I went to discount and had new tires and TPMS sensors installed and found out my TPMS light stayed on. Mercedes service said it would be $1,100 to get them to work. I ended up pulling the TPMS sensors off my old steel rims discount tires was getting rid of for me, and had them install them on my new rims and the TPMS light went out. (You have to use OEM Mercedes TPMS sensors for the system to recognize the sensors regardless of what Discount tires telling you that their $60 ea tmps sensors are programmed the same). The Mercedes manager suggested I use a piece of black electric tape to cover up the tpms warning light rather then spend $1,100 to troubleshoot the sensors. I even ended up having Mercedes replace the 12v batteries in both smart cars for $350 each since the cars are 6 years old and are not driven much and both batteries failed the charging test, and are a special size battery that only Mercedes can order and instal, and I figured was cheap insurance, since i went in the battery box under the floorboard, and it is also almost impossible to replace yourself unless you have the time and the tools to do it yourself.