Start with the records. Repair orders, warranty documents, mileage, and days out of service are more useful than general assumptions about whether a vehicle qualifies.
If you own a 2020 Mercedes-Benz GLS and you’re dealing with repeated repairs or stubborn problems, you’re not alone. California’s lemon law may offer protection when a vehicle has defects that the manufacturer can’t fix within a reasonable number of attempts, but it’s important to understand how the law works before you file. This guide from ZapLemon explains common 2020 GLS issues California drivers report and outlines practical steps to take so you can protect your rights and make informed decisions.
Common 2020 Mercedes-Benz GLS Defects in California
Owners of the 2020 GLS often report electrical and infotainment glitches. These can include a frozen or rebooting MBUX screen, intermittent backup camera image, Bluetooth or Apple CarPlay dropouts, warning lights that come and go, and rapid battery drain. Because these issues are frequently tied to software, dealers may try multiple updates or module replacements before the issue stabilizes. When a rearview camera fails to display properly or warning systems misbehave, the problem can be more than annoying—it can affect safety and confidence behind the wheel.
Drivetrain and ride concerns are another recurring theme. Some drivers notice hesitation, shudder, or hard shifts from a stop or during low-speed acceleration, as well as rough downshifts when slowing. Air suspension complaints may involve sagging after parking, uneven ride height, or a noisy compressor, especially overnight or in colder weather. Steering vibrations or a “pull” at highway speeds can add to frustration if alignments and balance checks don’t resolve the symptoms.
Body, climate, and braking issues also appear in owner reports. Examples include water leaks at the panoramic roof or tailgate leading to damp carpet or musty odors, A/C that won’t cool consistently in hot California weather, and brake squeal or pulsation that returns after new pads or rotors. Sensor problems with blind-spot monitoring or parking assist can crop up intermittently. Mercedes-Benz has issued recalls and technical service bulletins affecting certain 2020 GLS vehicles, including software updates that address camera and display behavior. It’s smart to ask your dealer to check for open recalls and bulletins at each visit and to verify that all updates are applied.
Steps to Take Before a CA Lemon Law Claim
Start by confirming your warranty coverage and taking the GLS to an authorized Mercedes-Benz dealership for every repair visit. Clearly describe the symptoms, when they occur, and how often you can reproduce them. Before you leave the service drive, make sure the repair order includes your complaint in your own words, the dates and mileage, the technician’s diagnosis, and exactly what was done. Keep copies of every repair invoice, towing receipt, and rental or loaner record. Photos, videos, and a simple log of dates, symptoms, and conversations can be invaluable later.
Give the manufacturer a reasonable number of chances to fix the defect. Under California’s Song-Beverly Consumer Warranty Act, there is a legal presumption for vehicles within the first 18 months or 18,000 miles, but claims can exist outside that window too. While “reasonable” depends on the facts, serious safety issues may require fewer repair attempts, and being out of service for 30 or more cumulative days can also be significant. Avoid modifications that could complicate diagnosis, and ask the dealer to check for technical service bulletins or recalls related to your complaints.
If problems persist, escalate. Contact Mercedes-Benz USA customer care and provide a written summary of the history with copies of repair orders. Consider sending a written notice to the manufacturer by certified mail, keeping proof of delivery. You may be offered arbitration through a manufacturer or third-party program, or you can speak with a California lemon law attorney about your options. Potential remedies under the law can include a repurchase or replacement in qualifying cases, but outcomes depend on the facts and are not guaranteed. A consultation with ZapLemon can help you understand the process and what to expect next.
Ongoing defects on a 2020 Mercedes-Benz GLS can be stressful, but you don’t have to navigate California lemon law on your own. By documenting your repair history, working with an authorized dealer, and learning the basics of the Song-Beverly Act, you’ll be better prepared to decide your next steps. ZapLemon is here to answer questions and provide guidance tailored to your situation.
This article is for informational purposes only, does not constitute legal advice, and reading it does not create an attorney-client relationship. Every case is different; you should consult with a qualified attorney about your specific facts. Attorney advertising.
Need a case-specific review?
Use the case-review form to share the warranty, repair orders, dates, mileage, and supporting facts an attorney would need to evaluate, or call (877) 492-8282.
Attorney advertising. General information is not legal advice and does not create an attorney-client relationship. No result is promised or guaranteed.