Mercedes-Benz C Class, CL Class, CLA And 7 More Recall R/2017/124: Faulty Control Unit May Cause Vehicle To Perform Outside Specification, Who Is Affected And What To Do
- Low
- How serious
- 19 Apr 2017
- Launched
- 42
- vehicles in the UK
- SRPC1709
- Manufacturer’s campaign code
Mercedes-Benz recalled C Class, CL Class, CLA and 7 more vehicles built between 1 January 2004 and 31 March 2017. Where a control unit coding was updated in a workshop between 3 December 2016 and 5 December 2016 the coding may not correspond to the specification and may trigger unplanned action in the vehicle. The recall notice describes the fix as: that are likely to be affected and update the software in the corresponding control units. You won't usually pay for it.1
What’s Wrong
Where a control unit coding was updated in a workshop between 3 December 2016 and 5 December 2016 the coding may not correspond to the specification and may trigger unplanned action in the vehicle. The safety and emissions systems may not react as design intent.
DVSA's Original Wording
Concern: FAULTY CONTROL UNIT MAY CAUSE VEHICLE TO PERFORM OUTSIDE SPECIFICATION Defect: Where a control unit coding was updated in a workshop between 3 December 2016 and 5 December 2016 the coding may not correspond to the specification and may trigger unplanned action in the vehicle. The safety and emissions systems may not react as design intent. Remedy: Recall the vehicles that are likely to be affected and update the software in the corresponding control units.
Contains public sector information licensed under the Open Government Licence v3.0.
The Risk
If the fault occurs, the recall notice says it could cause vEHICLE TO PERFORM OUTSIDE SPECIFICATION.
The Fix
The recall notice describes the fix as: that are likely to be affected and update the software in the corresponding control units. The fix is a software update, which usually takes under an hour at the dealer.
Are You Affected?
C Class, CL Class, CLA and 7 more built between 1 January 2004 and 31 March 2017 may be included. Mercedes-Benz estimates 42 vehicles in the UK. Enter your registration to check, then confirm by VIN with Mercedes-Benz, because not every car in the date range may be included.
Which Car Is It?
Choose the make and model so we can match recalls to your car.
What To Do Now
- Check your car by registration above, then by VIN with Mercedes-Benz.
- Book with any franchised Mercedes-Benz dealer, quoting the campaign code SRPC1709 or the DVSA reference R/2017/124. See how to get a Mercedes-Benz recall fixed.
- Follow the letter's instructions until the repair is done. See can you drive a car with a recall?.
Related Recalls
| Launched | Vehicle and fault | Severity | Reference |
|---|---|---|---|
| CLS, E Class, GLCDrive shaft joint | Low | R/2026/148 | |
| CLA, GLBElectric drive unit power electronics | Low | R/2026/315 | |
| E ClassCoolant pump control software | Low | R/2026/201 | |
| S ClassWindshield bonding | Low | R/2026/191 | |
| CLA, GLBSoftware version of communication module | Low | R/2026/203 |
This is one of 833 Mercedes-Benz recalls in DVSA’s data. The Mercedes-Benz recall launched before it was R/2017/127 on 12 Apr 2017, for door lock may fail to release. The one launched after it was R/2017/134 on 27 Apr 2017, for steering coupling may become loose. You can also see every Mercedes-Benz recall, the Mercedes-Benz C Class recall history and all recalls launched in 2017.
Source: DVSA recall R/2017/124, launched 19 April 2017. Data updated 15 October 2026. How we grade urgency.
Sources
- The Code does not itself say repairs are free. GOV.UK guidance says "You will not usually have to pay for any repairs or parts under a safety recall." gov.uk Checked 15 Oct 2026.