Mercedes-Benz C Class, CLS, E Class And 7 More Recall R/2020/243: Engine Control Unit Software To Be Updated, Who Is Affected And What To Do
- Low
- How serious
- 6 Oct 2020
- Launched
- 994
- vehicles in the UK
- SRPC2027
- Manufacturer’s campaign code
Mercedes-Benz recalled C Class, CLS, E Class and 7 more vehicles built between 8 November 2011 and 31 May 2018. Improve the vehicle emissions via software updates. The dealer will update the relevant control unit,s software and if necessary replace the NOx sensors. You won't usually pay for it.1
What’s Wrong
Improve the vehicle emissions via software updates.
DVSA's Original Wording
Concern: ENGINE CONTROL UNIT SOFTWARE TO BE UPDATED Defect: Improve the vehicle emissions via software updates. Remedy: Update the relevant control unit�s software and if necessary replace the NOx sensors.
Contains public sector information licensed under the Open Government Licence v3.0.
The Risk
The recall notice describes the concern as: engine control unit software to be updated.
The Fix
The dealer will update the relevant control unit,s software and if necessary replace the NOx sensors. The fix is a software update, which usually takes under an hour at the dealer.
Are You Affected?
C Class, CLS, E Class and 7 more built between 8 November 2011 and 31 May 2018 may be included. Mercedes-Benz estimates 994 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 SRPC2027 or the DVSA reference R/2020/243. 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 | |
| GLEInstallation of the heat shield | Low | R/2026/326 | |
| E ClassCoolant pump control software | Low | R/2026/201 | |
| GLERear seat belt bolting | Urgent | R/2026/221 | |
| S ClassWindshield bonding | Low | R/2026/191 |
This is one of 833 Mercedes-Benz recalls in DVSA’s data. The Mercedes-Benz recall launched before it was R/2020/241 on 6 Oct 2020, for engine control unit software to be updated. The one launched after it was R/2020/249 on 6 Oct 2020, for the engine control unit software needs to be updated. You can also see every Mercedes-Benz recall, the Mercedes-Benz C Class recall history, all recalls launched in 2020 and software recalls across every make.
Source: DVSA recall R/2020/243, launched 6 October 2020. 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.