More than 300 cars are included in the campaign, which builds on a small S-Class recall announced at the same time.
Mercedes-Benz has recalled a smattering of 2018 and 2019 C-Class, E-Class and S-Class models, over concerns about an issue with the seatbelt detection system.
According to the company, it's possible affected cars will not register a correctly-engaged seatbelt. A warning light and tone will sound in the instrument cluster, and there's a risk the car's Pre-Safe system won't function.
If the seatbelt pre-tensioner doesn't operate before an accident, the "complete effect of the restraint system could not be ensured".
Mercedes-Benz will contact owners of the affected vehicles, and advise them to get in touch with their nearest dealership to arrange a free fix.
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