Unfortunately, the warranty expired on January 31st, and the issue began just a few weeks ago when the weather took a turn for the worse. 😔
I contacted Mercedes Teesside, but I was informed that there would be a charge of £175 just to look into the issue (though this is at the technician's discretion, and it might be resolved at no cost).
Indeed, the part numbers align perfectly, and it functions as intended. The original issue continues to persist, which makes me believe it simply requires clearing or coding.