BestCarRank
Mercedes-Benz

2020 Mercedes-Benz CLS 450

Problems, Recalls & Reliability Report

Excellent Reliability

Quick Summary

The 2020 Mercedes-Benz CLS 450 has 6 owner complaints filed with NHTSA — that's 0.1x the segment average of 80. The most common issue is electrical problems (67% of all complaints), specifically: 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 curr.

6

Total Complaints

0

Recalls Issued

—/5

Safety Stars

0.1x

vs Segment Avg

Known Problems

ELECTRICAL

4 complaints
67%
  • • 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 CURR
  • • 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
  • • 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.
Typical onset: 50K miles Est. repair: $500

“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 CURR”

— NHTSA complaint filing

ENGINE

1 complaints
17%
  • • 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 CURR
Typical onset: 50K miles Est. repair: $500

“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 CURR”

— NHTSA complaint filing

WHEELS

1 complaints
17%
  • • 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
Typical onset: 50K miles Est. repair: $500

“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 ”

— NHTSA complaint filing

Estimated Repair Costs

ELECTRICAL(~50K mi)
$500
ENGINE(~50K mi)
$500
WHEELS(~50K mi)
$500

Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.

🔍 Pre-Purchase Inspection Checklist

Based on 6 owner complaints for this specific year, here's what to check or ask about:

  • ☐
    ELECTRICAL: 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 CURR

    Typically appears around 50K miles. Repair cost ~$500

  • ☐
    ENGINE: 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 CURR

    Typically appears around 50K miles. Repair cost ~$500

  • ☐
    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

    Typically appears around 50K miles. Repair cost ~$500

  • ☐
    General: Get a pre-purchase inspection from an independent mechanic ($100-$200)

Mercedes-Benz CLS 450 — Year Comparison

How does 2020 compare to other years? Fewer complaints = more reliable.

2022
5Excellent Reliability
2020
6Excellent Reliability
2019
17Excellent Reliability
Full years-to-avoid analysis →

NHTSA Safety Rating

No NHTSA safety rating available

At a Glance

Complaints
6
Recalls
0
Fire reports
0
Crash reports
0
Injury reports
0
Segment avg
80

Check a Specific VIN

See recalls for YOUR 2020 Mercedes-Benz CLS 450

Compare With

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