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 your 2020 Mercedes‑AMG S 63 keeps going back to the shop for the same issues, you’re probably wondering whether California’s lemon law can help—and how to start that conversation with the dealer. Below, ZapLemon explains the basics in plain English and shares practical, non-legal tips for talking to the service department without escalating conflict.
2020 Mercedes-AMG S 63: California Lemon Basics
California’s lemon law (part of the Song‑Beverly Consumer Warranty Act) generally protects consumers when a vehicle has a covered defect that the manufacturer can’t fix after a reasonable number of attempts. For a 2020 Mercedes‑AMG S 63, that usually means problems that arise while the car is under the manufacturer’s new-vehicle warranty or a certified pre-owned warranty. Common S 63 complaints we hear about include ABC or air suspension warnings, transmission shudder under light throttle, electrical gremlins in the COMAND infotainment, repeated “no start” or battery drain events, persistent check-engine lights related to the twin-turbo V8, or active safety features like DISTRONIC and lane-keeping that drop out.
The phrase “reasonable number of repair attempts” doesn’t have a one-size-fits-all definition, but California provides helpful guidelines. For example, within the first 18 months or 18,000 miles, a presumption can apply if the dealer tried to repair the same problem multiple times (often two for serious safety issues or four for the same non-safety defect) or if the car was out of service for more than 30 total days for warranty repairs. These are guidelines—not strict requirements—and every situation turns on its facts, including severity, frequency, documentation, and warranty coverage.
If your S 63’s defect qualifies, potential remedies under the law can include a buyback or a replacement vehicle from the manufacturer, sometimes with a mileage offset. That said, no result is guaranteed, and the process isn’t instant. What you can control right now is the quality of your records and how you communicate with the dealership. Clear, consistent documentation is often the difference between a frustrating back-and-forth and a successful resolution.
Talking to the Dealer: Records, Tone, Next Steps
Start with records. Keep a folder—paper or digital—with every repair order, invoice, and diagnostic report. Each time you visit the dealer, make sure the service advisor writes your complaint exactly as you describe it: when it happens, how often, conditions (speed, temperature, fuel level), and any dashboard warnings. Ask that “no trouble found” visits still list your symptoms and the tests performed. Track dates the car is at the dealership, miles in/miles out, rental/tow receipts, and any communications with Mercedes-Benz customer care. This timeline becomes critical if you later request a buyback evaluation.
Keep your tone calm and factual. When you drop off the car, speak in specifics, not conclusions: “At 65–70 mph on smooth freeway, a vibration is felt through the seat for 10–15 minutes after 20 minutes of driving” is more helpful than “it shakes.” Offer to ride along with a technician to duplicate the issue. Ask the service advisor to check for Technical Service Bulletins (TSBs) and software updates, and to note software part numbers/versions in the repair order if updates are applied. Before you leave, confirm you’ll receive a copy of the final, signed repair order—even if the dealer cannot duplicate the concern.
Plan your next steps if the problem continues. After two or more unsuccessful repairs (or significant time out of service), politely escalate: ask to open or update a manufacturer case with Mercedes‑Benz USA and request the case number in writing. Continue scheduling repair attempts through an authorized dealer so your warranty rights remain intact. If the defect affects safety—such as brake or steering warnings—document that clearly and do not drive the vehicle if it feels unsafe; arrange towing through roadside assistance. At any stage, you can contact ZapLemon to discuss your situation and learn about your options. A consultation can help you understand the process, timelines, and what documentation will be most useful, but only after a consultation can you receive legal advice tailored to your facts.
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.