This will be long and may not be interesting to everyone but here are my initial impressions of my 2018 S450 after about a month of ownership.
The Deal:
I bought my car from a Jeep dealer. It had the Premium package [massaging seats, perfumed air conditioner, etc] and was in near perfect condition. There was a MB dealer right across the street and the equivalent car would have been 10K more. I know because I checked. My 2015 Hyundai Genesis 5.0 Ultimate got me an $18K trade-in offer. I had done my homework and knew it was worth at least 20K. The dealer showed me a Manhiem [auction site] printout but I knew a car like mine would never see an auction. I presented my evidence and insisted on nothing less. I had to walk out once to get this deal but I knew I was well within reasonable boundaries. I monitored the dealers web site after my purchase. My Genesis sold for $21,500 within 3 weeks. I was fine with that. Dealerships can't exist if they can't make a profit.
The Car:
I know this is a Genesis forum but I'll be honest. This car is exquisite!!! It is meticulously designed to the point of almost being ridiculous. It includes...
1) Unbelievable Attention To Detail.
> The dual 12.5 digital instrument clusters are sublime. They are perfectly positioned and, along with the rest of the cars aesthetics, provide an experience nothing short of a cockpit. In fact, I think that's what MB calls their cabin. You have full control and can put the data you want where you need it to be. Want Nav on the main [or entertainment system] display? No problem. Want music on either display? Also no problem.
> Air Freshener - Also included with the Premium package is the air purifier [and ionization] system.
My car did't have the perfume reservoir but I found one on eBay for $80.00. With this I can now turn on the heater or the AC and have my favorite scent distributed via the vehicles ventilation system. When it's empty I can simply refill it with whatever fragrance I choose.
> "Semi" Autonomous Parking - My car can do this according to its documentation but I haven't been able to make it work just yet. There are many other features I am forgetting at the moment. I may list them later if requested. For now let's move on.
As stated in previous comments, there is some strangeness, actually, quite a bit of it. I don't know in what order I should list these comments so I'll just go random.
> You can't truly turn off the radio or any other media source. You can, but if you do it also turns off the infotainment screen. If you want that screen active [as most would] yet don't want to hear sound you have to accept muted sound as being the equivalent to actually turning the system off. I found this very strange and had to confirm it from reliable sources but it is true.
> Tires
My 2015 Genesis had staggered tires and I wanted to avoid that if possible with my next car since I spent hundreds replacing them as I encountered potholes here and there. The S450 came with 18 inch wheels [remember, I bought it used] but the car can also be equipped with either 19's or 20's. In most cases these would be staggered run-flats. I didn't want run flats because they generally suck. Before I understood this I ordered 19 inch wheels and later learned that some shops [Costco, Sam's
Club etc.] would not even install them, claiming they weren't OEM equipment. "If the car is spec'd for run flats then that's what we have to sell you." They also refused to install the staggered options for this car because [according to them] the car was spec'd for 18 inch run-flats. This is not the fault of the car of course. It can accommodate all of those sizes. Since I abandoned the run flat option I've been looking for a donut-type spare I can store in my trunk. Haven't found one yet. Most newer luxury level cars are coming with run flats and without spares so this one [I think] is a draw. From what I've heard, the 2020 G90 will also be sans spare. I hate this and will continue looking for a suitable spare for my vehicle.
Compared to Genesis Models:
My 2015 Hyundai Genesis 5.0 had radar-guided cruise control and a Heads-Up Display. I bought it brand new and paid a lot less than what I paid for the Mercedes S450. My Benz lacked these features, [they call the former Distronic] listing them as options that new car buyers could have purchased at the time of manufacture. Of course we all know most cars sitting on dealer lots are equipped with "typical" options. I'm still scratching my head on this one as I just assumed Distronic would be standard on any near $100K vehicle today. In this case Genesis definitely wins with their simple "base or ultimate" model pricing.
Ease of Use:
While the 2018 Mercedes Benz S450 is something to see and drive, it is not an intuitive machine. I poured through the manuals for hours and still couldn't figure certain things out. By contrast, my [full featured] 2015 Genesis was much easier to get used to. I still read the manuals but only for my edification. The basics of the car were intuitive. I haven't owned an Equus or a G90 but I still believe the higher end Genesis vehicles will be more intuitive than anything MB has to offer.
SUMMARY:
The 2018 Mercedes-Benz S450 is an amazing machine in all aspects but it is also a different car than you're probably used to. If you've owned recent MB models you may not be as intimidated. My last MB was a C32 AMG back in 2001. Today's offerings are whole different animals. You can't just get in this one and drive. You need to take some time to understand the car first. The learning curve is probably most similar to that of driving a Tesla Model S. I drove one of these a few years ago and decided NOT to buy.
Conclusion:
If your ultimate concern is value then I would recommend the 2020 G90, assuming the wheels and other factors we've discussed here don't bother you too much. The 2020 G90's interior [while quite nice, especially the seats] cannot compete with even the base S Class] but you will get standard features with the Genesis platform that will cost thousands more with the S Class. If you're coming off lease and have a decision to make I wouldn't rule out the S Class. I'm getting used to mine and coming to love it more each day.
Hyundai has been a difficult company for me to comprehend. They gave their Kia K900 better aesthetics and tech than the G90 at the time. They did the same thing back in 2015 when I bought my first Hyundai Genesis. At that time the older Equus had better tech.
Meanwhile I just saw this. It appears to be the much-awaited Hyundai version of the K900 but when and where will it even be available?