UsedAMG:thebuyer'schecklistnobodytellsyouabout

Mercedes-AMG cars have a reputation for big numbers and bigger bills. Most of that's earned. But there's a way to buy a used AMG and not get caught out — and most of it comes down to what you check before you sign. We've put together the same checklist we work through on every AMG that comes through BN.

Start with the service history. Main dealer is preferred but not essential. Specialist independent is fine if the receipts are detailed and the work makes sense. What you don't want to see is gaps — particularly gaps in the first three years, when the engine was breaking in. An AMG that's missed a service early in its life is an AMG that will cost you down the line.

The M177 V8 in the C63 and E63 is a strong engine, but it doesn't like being abused cold. Listen for any rattles on first start-up — particularly at the top end. Pull the dipstick and check the oil isn't black or thin. If the seller can't tell you the last time the oil was changed, walk away. The newer M139 four-cylinder in the A45 and CLA45 has its own issues — primarily timing chain wear if oil intervals were stretched.

The 7-speed SpeedShift MCT gearbox should be smooth in normal mode and snappy in Sport+. Any hesitation or shift shock is a red flag. The gearbox software is good at masking mechanical problems, so a test drive in multiple modes is essential. The newer 9G-tronic in the S63 and AMG GT models is more refined but more expensive to repair when it fails.

AMG cars use ceramic composite brakes as an option and conventional drilled steel discs as standard. Both wear quickly under spirited driving. Look at the disc faces for deep grooves or cracking. Pad material should sit roughly even left and right. The AMG Ride Control adaptive suspension is reliable but expensive to replace — check for any clunking on poor surfaces.

Carbon trim packages — particularly the carbon ceramic kit on the C63 and the Night Pack on later models — add real money to the resale value. Make sure they're factory-fit, not aftermarket. Leather wear on the bolsters is normal. Heavy creasing on the driver's seat from someone vaulting in and out is not. Check the boot floor for water marks — sunroof drains block on these cars.

MBUX in the newer cars (post-2018) is reliable. The COMAND system in older C63s is showing its age — make sure the screen still responds cleanly and the sat nav loads. Keyless entry should work from both front doors. The Burmester sound system, when fitted, is a £4,000 option new and should sound noticeably better than the standard stereo.

Walk away if: there's no service history, the seller can't account for the previous owners, the car shows accident damage in HPI, or anything in the test drive doesn't feel right. There are too many good used AMGs on the market to settle for a compromised one. If you're looking and want a second opinion, send us the listing — happy to give it a read.