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Electrical systemPart report

2019 Mercedes-Benz CLS 450 Electrical system Problems

Complaints
4about this part
Share
27%of 15 total for the year
Median mileage
46,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 4 complaints about the electrical system of the 2019 Mercedes-Benz CLS 450, 27% of the 15 complaints for this model year. Where a mileage was given, the median is 46,000 miles. 4 recall campaigns on record are 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.

“My car started shaking and after putting it on the computer it was an electrical wiring harness issue. I was told it will be 6 k to replace both harnesses. It’s been 8 months and they just received the part. The service tech told me that these cars have this issue due to the position of the harnesses being to close to the exhaust. It dries out the wiring. I went to the Mercedes forum and found numerous complaints about this issue. …”

NHTSA complaint #11580697, filed 2024-04

“While driving on an interstate highway, I received a yellow 48V Battery malfunction notice. Because this battery had failed before, I had read on internet forums that the car could just stop working, so I took the next exit (about 3-4 miles). At the top of the ramp, I had a red Battery Malfunction (red=stop driving); then, within 15 seconds the car had no power and gave me a critical engine overheated message. I was able to coast into a parking lot. Had I not exited, the loss of power would have likely resulted in an accident and we could have been killed. …”

NHTSA complaint #11434449, filed 2021-09

“The contact owns a 2019 Mercedes-Benz CLS450. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact was able to pull over to the shoulder of the roadway, where the failure persisted; however, the contact was able to continue driving to the destination at slow speeds. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the transmission wiring harness. The vehicle was repaired. …”

NHTSA complaint #11680421, filed 2025-08, 46,000 miles

Related recalls

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
2020480%
2019427%

Other parts of the 2019 Mercedes-Benz CLS 450

Wheels
5 complaintsSteering
3 complaintsEngine
2 complaintsSuspension
2 complaintsTires
2 complaintsBack-over prevention (rear camera)
1 complaintsBrakes
1 complaints

← All problems reported for the 2019 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