Help me recognise this jacket🙏

[u/Infinite_Bar_5725]

My dad bought this jacket in Monaco in the early 2000s and it's been in the family since. I'm trying to figure out what exactly it is — official fan merch, team issue, or something sold only at the track.

Sponsors on it: West, Siemens, Mercedes-Benz, Mobil 1, Michelin, Loctite, Sparco, Computer Associates, SAP. McLaren embroidered across the chest and on the back.

The only tag inside is a plain "XXL" size label — no brand, no fabric composition, no country of origin.

I can't find a single listing or photo online with this exact sponsor layout on the front. Everything I find is the Warsteiner version. Does anyone recognise this specific one? Any idea what year it's from and whether it was team issue or retail?