Recalls: Mercedes-Benz C257 CLS-Class
Overview
Manufacturers, or importers, issue recalls for defects or faults which have the potential to cause injury. Generally, manufacturers will inform the original buyers if their vehicle is subject to a recall and of the steps required to remedy the defect or fault. Please note that the recalls below (if any) are for Australian-delivered vehicles only. Furthermore, the number of recalls should not be taken as an indication of a model’s reliability or its safety more generally.
Recalls: Mercedes-Benz C257 CLS-Class
2017-18 Mercedes-Benz C257 CLS: front passenger airbag may not deactivate for child seat
In December 2018, a recall was issued for Mercedes-Benz C257 CLS Coupes that were available for sale from 2 October 2017 to 29 June 2018. If a child seat was installed in the front passenger seat, it was possible that the front passenger airbag might not be switched off as intended and could be triggered in the event of a collision – this increased the risk of injury for a child in a rearward-facing child seat. For the VINs of the recalled vehicles, please see PRA 2018/17209.
2018-19 Mercedes-Benz C257 CLS Class: engine may shutdown or not restart
In March 2019, recall campaign RC2647 was issued for Mercedes-Benz C257 CLS Class vehicles that were available for sale from 22 May 2018 to 4 February 2019. Software in the powertrain control unit may not operate as intended and the engine warning light may not activate to warn the driver of the fault. As a result, the engine control unit may reset such that –
- The engine may not restart if the reset occurred during an ‘ECO’ stop; and,
- The engine may lose power and cause the vehicle to coast if the reset occurred while the vehicle was being driven.
Unexpected engine failure therefore posed a hazard to vehicle occupants and other road users. For the VINs of the recalled vehicles, please see PRA 2019/17430.
2019 Mercedes-Benz W257 CLS-Class: radar sensor control unit failure
In August 2019, recall campaign RC2707 was issued for Mercedes-Benz W257 CLS-Class vehicles that were available for sale in Australia from 1 March 2019 to 30 July 2019. Due to an error in the active brake assist software, one of the radar sensor control units may fail. If the radar sensor control unit failed, the ‘Active Brake Assist’ function may not activate and this increased the risk of a collision and injury to both vehicle occupants and other road users. To fix, the software for the radar sensor control unit was to be updated. For the VINs of the recalled vehicles, please see PRA 2019/17768.
2018-19 model year Mercedes-Benz C257 CLS Class: coolant pump power supply and stall
In October 2019, recall campaign RC2725 was issued for Mercedes-Benz C257 CLS Class vehicles. In these vehicles, the electric line for the power supply of the coolant pump could make contact with the engine fan and cause damage. This, in turn, could cause a malfunction of the coolant pump or a deactivation of the 48 volt on-board electrical system, potentially causing:
- The engine to stall due to extremely high coolant temperature; or,
- The engine to not restart after shut-off by the ECO start/stop or ‘glide mode’ functions.
In both cases, the vehicle could stall and this increased the risk of a collision. For the VINs of the recalled vehicles, please see PRA 2019/17873.
2018-19 Mercedes-Benz C257 CLS Class: front seatbelt buckle housings
In July 2020, recall campaign RC27650 was issued for Mercedes-Benz C257 CLS Class vehicles that were available for sale in Australia from 1 August 2018 to 29 March 2019. In these vehicles, the front seatbelt buckle housings may not have been correctly manufactured. As a result, a correctly-fastened seatbelt may be detected as not fastened – this would cause the seatbelt warning light to remain illuminated and a warning tone would sound when the vehicle was being driven. In the event of a collision, neither of the vehicle’s seatbelt tensioning systems would be activated – this increased the risk of injury to occupants in the event of a collision. For the VINs of the recalled vehicles, please see PRA 2020/18344.
2019-20 Mercedes-Benz C257 CLS-Class: incorrect tension for oil feed and oil return line screws
In August 2020, recall campaign RC2807 was issued for Mercedes-Benz C257 CLS-Class vehicles that were available for sale in Australia from 1 April 2019 to 31 July 2020. During the assembly process, the screws for the turbocharger oil feed and oil return lines may not have been correctly tensioned. If the screws were loose, oil could leak out at the turbocharger oil feed and/or return line. If leaking oil came into contact with hot components parts, a fire could occur – this posed a hazard to vehicle occupants and other road users. For the VINs of the recalled vehicles, please see PRA 2020/18496.
Problems and faults: Mercedes-Benz C257 CLS-Class
Overview
This section identifies potential problems, causes and fixes based on the experiences of owners and repairers, online sources and technical service bulletins. This information is provided solely for reference purposes and AustralianCar.Reviews recommends that only properly qualified persons carry out repairs or modifications. Furthermore, the number of items below should not be taken as an indicator of a model’s reliability or the frequency with which they may may occur.
To report a problem or fault to the AustralianCar.Reviews team, please use the Contact Us form. Note that AustralianCar.Reviews does not offer advice on automotive problems or disputes; such enquiries will not receive a reply. For vehicles purchased from dealers after 1 January 2011, please see our Australian Consumer Law fact sheet.
Problems and faults: Mercedes-Benz C257 CLS-Class
No information regarding common problems and faults for the Mercedes-Benz C257 CLS is currently available.
