These kind of threads are so sad. So much mis-information, and I've seen it happen over and over again since I joined this forum with my new 2018 Spyder RT LIMITED 3 months ago.
So let's get things right.
1. There are TWO different types of "ACS Rear Suspension Adjustment" on a 2018 Spyder TOURING model. The BASE RT ONLY model has the MANUAL adjusting one, which you CAN manually adjust if you want to. The RTL (LIMITED Edition) has the AUTOMATIC adjusting one. It will automatically adjust the suspension to the best PSI ("best" being what the designers of the RTL determined THEY would use) for the detected load being placed on the suspension.
2. BOTH the 2018 and 2019 RT Operator's Guides describe BOTH these systems on pages 48 and 49 in the 2018 Guide and pages 49 and 50 in the 2019 Guide. Does anybody read the darn owner's manuals when you buy a $24,000+ vehicle anymore? I guess not everybody does. What a shame. But please note...the Operator's Guides are called "Spyder RT" guides. There is NO (that I know of) specific "Spyder RTL" guide. The "Spyder RT" guide CAN list systems that are different on an RT vs an RTL model. It is up to the Spyder's OWNER to know what systems are on THEIR model Spyder to begin with. See #3 below.
3. It is the BUYER'S responsibility to do their research about what comes on a vehicle BEFORE they buy it. If they had done this, they would have known the BASE 2018 RT uses the MANUAL adjusting system. The 2018 RTL (LIMITED Edition) uses the AUTOMATIC adjusting one. If the owner hadn't wanted an "automatic" one, they should NOT have bought the RTL "Limited" edition. BTW, here's the link to the CanAm site listing the differences between a 2018 RT and RTL versions. The information was always there for anyone to read before making their purchase, and could still be used as a reference before answering any forum questions about them.
https://can-am.brp.com/on-road/2018-models.html (Scroll down to get to the RT vs RTL comparisons)
4. As someone else has already mentioned, PLEASE, PLEASE, PLEASE...if you do NOT own the YEAR, MAKE, and MODEL of the "Spyder" being asked about in a thread, do NOT base your answer on your OWN make and model year. The 2018 and 2019 RT and RTL's are NOT the same as any earlier year's models. If you are going to answer a question about a 2018 or 2019 RT or RTL, have you read the specific Operator's Guides for them yet?
I'm sorry if I might sound harsh, but I have had the SAME kind of INCORRECT advice given to me by well-meaning people here about my 2018 RTL since I joined this forum. Please try to make sure you are offering ACCURATE advice to someone BEFORE you answer a question about THEIR make and model year Spyder.
For the OP: According to your post you bought the 2018 RTL (Limited). It has the Automatic system. If you didn't want that, you should have bought the RT ("base") model with the Manual system. Sorry. The 2018 RTL is going to automatically decide and adjust what ride height (PSI pressure) it wants to use based on the detected vehicle load.