Is Air Body Control “standard” on UK-spec GLC 43 AMGs?

[cluffy]

I was under the impression that Air Body Control/suspension was standard on GLC 43 models (and 63) but an optional upgrade on all other GLCs. Is this correct?
I’m in the market for a pre-owned GLC43 and some dealers are stating it was an upgrade at £1495. Any guidance/advice appreciated.