2020 Mercedes-Benz CLS 450 Electrical system Problems
- Complaints
- 4about this part
- Share
- 80%of 5 total for the year
- Median mileage
- 12,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the electrical system of the 2020 Mercedes-Benz CLS 450, 80% of the 5 complaints for this model year. Where a mileage was given, the median is 12,000 miles. 1 recall campaign on record is filed under a similar system.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The 2020 mercedes cls has a known defect in their 48v system that turns the engine off in locations with high het zones. I was told by the mercedes service department this has been occurring in arizona, new mexico, florida, nevada and saudi arabia. It's a know issue that they are unable to fix currently. I had my children in the car when I was making a left hand turn in a major intersection and the car just stalled on me, leaving me in a panic to try to start the car again before getting into an accident. Mercedes provided me a loaner while they tried to fix my car. …”
NHTSA complaint #11373086, filed 2020-11, 2,000 miles“The contact owns a 2020 Mercedes-Benz CLS450. The contact received notification of NHTSA Campaign Number: 22V533000 (Electrical System) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact had experienced the failure listed in the recall. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 22,000. VIN tool confirms parts not available.”
NHTSA complaint #11481015, filed 2022-08, 22,000 miles“The contact owns a 2020 Mercedes-Benz CLS450. The contact received notification of NHTSA Campaign Number: 22V733000 (Electrical System) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms remedy not available.”
NHTSA complaint #11496545, filed 2022-12Related recalls
- 22V733000Sep 30, 2022Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2019-2022 CLS450 Coupe and AMG E53, 2019-2021 AMG CLS53 Coupe, and 2021-2022 E450 vehicles. The 12-Volt…Covers: Mercedes-Benz CLS 450 2019–2022, AMG E53 2019–2022, AMG CLS53 2019–2021 +1 more
Related service bulletins
- 11036511Aug 24, 2026Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. EXAMPLE: when stored in trouser pocket…
- 11035120Jul 17, 2026Complaint Hand detection system – malfunction / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping…
- 11033855Jun 12, 2026Complaint Service code B1 displayed in the customer menu does not match the workshop code displayed in the workshop menu, e.g., 505 or 550A, which includes a service A. Cause The…
- 11033185May 26, 2026Complaint After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD 03/2026, the message "SOS - service not activated" appears on the…
- 11033016May 26, 2026Complaint The customer requests deactivation of the N112/9 HERMES communication module Note: Deactivation of the HERMES control unit (N112/9) is not supported for gray-market…
- 11031256Apr 2, 2026Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. EXAMPLE: when stored in trouser pocket…
- 11029927Mar 4, 2026Complaint Yellow information message in driver display (instrument cluster): "Switch on motor to charge the 12V battery" Cause The state of charge (SOC) of the 12V battery has…
- 11029087Feb 27, 2026Complaint This LI does Not apply to 223 or 206 which use a different generation of 48V systems. Please follow the relevant guided tests for the 223 and 206. For 223 with fault…
- 11029083Feb 25, 2026Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. E.g. when stored in trouser pocket…
- 11028807Feb 14, 2026Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the engine control unit software does not correspond to current…
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2020 | 4 | 80% |
| 2019 | 4 | 27% |
Other parts of the 2020 Mercedes-Benz CLS 450
← All problems reported for the 2020 Mercedes-Benz CLS 450
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology