Mercedes Pre-Purchase Inspection Checklist

The four-step Mercedes PPI checklist

Steps 1 and 2 cost little and can be done before you book the inspection — they often rule a car in or out.

Step 1: check the build before you book the inspection

An inspector checks condition; they won't usually tell you whether the car was built with the packages in the listing. On a Mercedes that matters, because equipment like the AMG Line, Night Package, Driver Assistance Package, Burmester audio and air suspension is chosen car by car. The Mercedes-Benz data card by VIN lists the factory option codes for that exact car — then give the inspector the list so they can confirm the hardware (for example, that an air-suspension car really has air springs and no warning messages). How the codes work is covered in Mercedes option codes.

Step 2: service and recall history

Mercedes-Benz maintenance alternates Service A and Service B about once a year or every 10,000 miles, so a well-kept car shows a regular pattern of visits — see Mercedes Service A vs B for what each includes. Gaps aren't automatically a deal-breaker, but they are worth a question and a price adjustment. Run the VIN through NHTSA's recall lookup for open safety recalls; a franchised dealer will fix those free.

Steps 3 and 4: scan, lift and road test

Ask for a scan of all control modules, not just the engine — a modern Mercedes has many networked modules, and stored codes in body, comfort or driver-assistance systems won't light the check-engine lamp. On the lift and road test, a useful benchmark is what Mercedes-Benz's own Certified Pre-Owned inspection covers: exterior, interior, electrical systems, engine, fluids, filters and transmission, plus a road test of steering, brakes, suspension, drive shaft and ride quality. A car that already passed that 165+ point inspection is covered in Mercedes certified pre-owned.

Where Mercedes owners report problems

From CarWhere's analysis of 9,323 NHTSA owner complaints across the most-documented Mercedes-Benz models (data as of July 2026), the component groups cited most often — a guide to where an inspector should spend time.

Raw federal complaint counts, not adjusted for sales volume; one complaint can cite several components.

Model-year detail: Mercedes GLE 350 years to avoid · Mercedes C 300 years to avoid · Mercedes GLC 300 years to avoid · Mercedes E350 years to avoid. Documented problems by model are collected in Mercedes-Benz known issues, and the general used-car process is in how to buy a used car.

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