The mixing ratio of the propellant for the seat-belt pre-tensioner igniters may be incorrect. In an accident in which the rear seat-belt pre-tensioners were activated, the igniters might not ignite as intended and the pre-tensioners would not provide the restraint performance required.
The recall concerns vehicles produced between August 2016 and May 2017.
Source: Alert 37/2017 A12/1259/17
What the owner should do?
If you read about a recall that you think may affect your car, the motor industry standards body Motor Codes offers a Vehicle Safety Recall search. By using this, any recalls that are active for your car can be identified. To use this facility, you’ll need the Vehicle Identification Number (VIN) for your car – this is a long code number that appears on the chassis plate of your car or – on most UK-registered cars – in the bottom-left corner of your windscreen.
If it’s confirmed there’s an active recall for your car, you should make contact with a Mercedes-Benz dealer or workshop that’s been officially authorised to perform repairs on behalf of the manufacturer. Usually that’ll be your nearest franchised dealership, or ‘main dealer’ as they’re sometimes known.