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Mercedes-Benz CLS 450Model year report

2020 Mercedes-Benz CLS 450 Problems

Complaints
5filed with NHTSA
Median mileage
12,000miles, 2 complaints with mileage
Recalls
5campaigns on record
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA crash rating
—no overall rating published
EPA fuel economy
26 mpgcombined, 3.0L 6-cyl · hybrid RWD · 24 city / 31 hwy

Sources: NHTSA records for the 2020 Mercedes-Benz CLS 450 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 5 consumer complaints for the 2020 Mercedes-Benz CLS 450. The part named most often is electrical system, with 4 complaints (80% of the total), followed by engine (1) and wheels (1). 2 of the complaints include a mileage, and 100% of those were filed for vehicles with under 50,000 miles; the median is 12,000 miles. NHTSA lists 5 recall campaigns and 187 technical service bulletins for this model year. Electrical system complaints overlap with 1 recall campaign and 79 technical service bulletins filed under the same part. Engine complaints overlap with 12 technical service bulletins filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Example complaints

Electrical system: “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

Wheels: “I purchased my 2020 Mercedes-Benz CLS 450 with approximately 12,000 miles on 08/16/2022. Throughout the course of my ownership the vehicle has had multiple sets of tires replaced due to them either being prematurely bald, developing multiple bubbles, or shredding due to cracked rims. Along with the tires being constantly replaced, I have had to replace 8 rims that have cracked under normal driving conditions. Upon doing research into why my rims crack so frequently, I discovered that this is a common occurrence with my model of Mercedes, as well as several other models. …”

NHTSA complaint #11579206, filed 2024-03

Mileage when problems were reported

100% of the 2 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 2,000 and 22,000 miles.

50%0–1050%10–250%25–500%50–750%75–1000%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (2 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 12,000 miles.

Complaints by year filed

Fewer than 15 complaints, too few for a reliable trend.

2020202232024
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Fuel economy and running cost

EPA ratings for each 2020 Mercedes-Benz CLS 450 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
CLS450 RWD3.0L 6-cyl · hybrid9-speed automatic243126$3,150
CLS450 4matic 4WD3.0L 6-cyl · hybrid9-speed automatic233026$3,150

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2020 Mercedes-Benz CLS 450 → · Check a VIN at nhtsa.gov/recalls

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 187 on record; the latest 10 are shown.

See all 187 bulletins →

Other model years of the Mercedes-Benz CLS 450

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2020512,0005—26—Not enough data
2019151,74012—26—Rising

All Mercedes-Benz CLS 450 model years

Frequently asked questions

How many NHTSA complaints does the 2020 Mercedes-Benz CLS 450 have?

NHTSA recorded 5 consumer complaints for the 2020 Mercedes-Benz CLS 450 as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2020 Mercedes-Benz CLS 450 is reported most often?

Electrical system is named most often, in 4 complaints (80% of the total), followed by engine with 1.

Has the 2020 Mercedes-Benz CLS 450 been recalled?

NHTSA lists 5 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2020 Mercedes-Benz CLS 450 get?

The EPA rates the 2020 Mercedes-Benz CLS 450 (CLS450, 3.0L 6-cyl · hybrid) at 26 mpg combined, 24 city and 31 highway, with an estimated annual fuel cost of $3,150 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2020 Mercedes-Benz CLS 450 reported?

Among the 2 complaints that include a mileage, the median is 12,000 miles and the middle half falls between 2,000 and 22,000 miles; 100% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.