I'm new to this forum and Abarth ownership in general, having only owned my Abarth 500 for a couple of months after having a MiTo for 4 years, so this may very well be a silly question. I've been wondering if there's any way to tell whether my 500 has had any extras fitted by the previous owner.

It's a 59 plate that has had some modifications fitted by the previous owner including Team Dynamics Pro Race 1.2 alloys and the Magneti Marelli Bombardone exhaust. However it also has some features which were described to me as being from a different spec despite not being advertised or sold as anything other than a stock 500 T Jet, and has no stamps in the handbook to suggest it had dealer kits fitted. Some of the features in question include red suspension springs (lower on the front than the rear), BMC air filter and bonnet sticker, Brembo brake pads and Koni shock absorbers with Abarth logo as well as an esseesse badge on rear all of which I believe have been fitted by the previous owner as I don't have the receipts for any of it besides the exhaust. My car had new discs fitted all round about 2 months before I bought it and they are not drilled so not an ss; as far as I can tell with an untrained eye it is just a factory spec.

TLDR; How do I know whether my 500 been fitted with any of the "elaboration kits" sold by Abarth?

Thanks for your reply! I did wonder what the process was for getting authentication from Abarth that you had the esseesse kit installed. I didn't think mine had the esseesse kit due to not having any of the paperwork to prove it, or at least that it definitely didn't have any kits installed day 1 like yours did. Rather, as you say, I get the feeling the previous owner gradually installed some of the parts featured on the ss themselves instead of through an official dealer. Am I right in thinking that other than the alloys and paperwork the easiest way to identify a genuine 500 ss at a glance would be the brake discs?

Also, the tyre pressure monitor.  Basically a special chunky looking dust cap that needs a tool to remove.  That had a little indicator in the end that went white when OK, red when low.  If you could get them just right as they were a pain. Used to screw on with tool, push down on the end and turn the top as if loosening without the tool.  You'd hear it click and then let go, if you were lucky it'd stay white.  If not you just kept repeating.

Finally, if you have to get the tyres replaced, check the dimensions of your valve.  I've had someone change them before and put the wrong length valve on so they stuck out further than the edge of the Esseesse wheel.  I just make a note to tell them it needs shorter/stubby valve stems.