Smart to tackle that. I don't even think it's so much the mileage as just the age of the car. And we don't know if anyone has ever replaced that connector on your car so it sure can't hurt.
What I would prioritize however is going after the Relay Control Module (RCM). If you can use a soldering iron, touch up those three joins on that board yourself (there instructions with picture in the How-To section of the forum). Or if you don't wanna go that route just order a new RCM and plug that in. Literally a 5 minute job. You just pop the hood, open the black plastic box in the back of the engine bay (passenger side). There are I believe 5 connectors plugged in. Unplug them, take out the RCM (just sits in there) and plug the connectors into the new RCM and stuff that back inside of the box. Done.
For a while you could find cheap Crossfire for sale with the owner stating they tried everything but the car will not start...was just the RCM's fault.
Easy fix and for sure to go on pretty much all Crossfire if not replaced/fixed. That will get you stranded if it goes and it can be intermittent. Sometimes car starts again to the later fail again.

Here is what you are looking for. Might be able to find cheaper elsewhere but this is the original OEM:
https://www.fcpeuro.com/products/mercedes-ecu-relay-1705450305

Here is one, too a bit cheaper but might be aftermarket but reviews are great:
https://www.amazon.com/Standard-Motor-Products-RY-1562-Relay/dp/B005UW7DFI/ref=mp_s_a_1_1?crid=1SJ8JC8M2M6IW&keywords=chrysle r+crossfire+relay+control+module&qid=1672080830&sp refix=chrysler+crossfire+relay+control+module%2Cap s%2C126&sr=8-1&ufe=app_do%3Aamzn1.fos.f5122f16-c3e8-4386-bf32-63e904010ad0

Good luck, you got this!
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