Mercedes-AMG

The short version

AMG began as an independent tuning house and became Mercedes-Benz's performance division. The appeal is simple: a large, comfortable car with an engine that feels deliberately excessive. The C63 and E63 are the best-known models, but the GT, SL and compact A45 also carry the badge.

The ownership risk is model-specific. The naturally aspirated 6.2-litre V8 is beloved but has known head-bolt and camshaft issues. The later 4.0-litre twin-turbo V8 is stronger but not immune to turbo and cooling faults. The newest four-cylinder hybrid C63 is a different proposition entirely.

The models that define the brand

The C36 and C43 established AMG as a factory-backed tuner in the 1990s. The C55 and E55 followed, and the 2005 C63 with the M156 6.2-litre V8 became a modern classic. The W204 C63 is the enthusiast favourite, the W205 moved to the 4.0-litre twin-turbo V8, and the current C63 uses a four-cylinder hybrid.

The AMG GT is the standalone sports car. The GT, GT S, GT C and GT R use a front-mid-engine layout and a dual-clutch gearbox. The GT Black Series is the extreme version. The A45 and CLA45 bring the badge to the compact class.

What it costs to own

A routine service on a C63 or E63 typically costs £500 to £1,200, with major intervals higher. Tyres are £800 to £1,400 a set, and brakes are £800 to £1,500. The M156 V8 is the biggest risk: head bolts, camshafts and lifters can fail, and a rebuild is a five-figure bill.

The M157 twin-turbo V8 in the E63 and S63 has known turbo wastegate and cooling issues. The M177 in later cars is more robust but still expensive to repair. Air suspension and complex electronics are common across the range.

Known weak points

• M156 6.2 V8: head bolts, camshaft wear, lifter noise and oil consumption.
• M157 4.0 twin-turbo: turbo wastegate rattle, cooling leaks and PCV faults.
• M177 4.0 twin-turbo: turbo and cooling issues on early cars.
• C63 W205: rear subframe rust on early UK cars, MCT gearbox jerkiness.
• E63: air suspension leaks and transfer-case wear.
• AMG GT: rear tyre wear, brake wear and expensive body panels.

What to check before buying

Start with the service history and a specialist inspection. On an M156 car, listen for a cold-start rattle and check whether the head bolts have been replaced. On an M157, listen for turbo wastegate rattle and check for coolant leaks. On a W205 C63, inspect the rear subframe and check the MCT gearbox at low speed.

Check the body for accident repairs and the wheels for kerb damage. These are heavy, powerful cars, so tyres and brakes wear quickly.

Market and depreciation

The W204 C63 with the M156 is the collector favourite, and clean examples are climbing. The W205 C63 has depreciated but is now approaching the bottom of its curve. The E63 is cheaper than the equivalent C63 because it is larger and less fashionable. The AMG GT has depreciated heavily, which makes a used one tempting but expensive to run.

Limited editions and the GT Black Series hold value better than volume models.

Who it suits

AMG suits a buyer who wants a comfortable car with a loud, powerful engine and does not need a manual gearbox. It also suits a collector who understands the M156 risk. It does not suit someone who wants a lightweight sports car or a cheap track toy.

The W203 C55 and W211 E55 are the older cars, and they are climbing. The C55 uses a naturally aspirated V8 and a conventional automatic, which makes it simpler than the later cars. The E55 is a supercharged V8 and offers enormous performance for the money, but the air suspension and brakes are expensive.

The A45 and CLA45 are the compact AMGs. They are fast and practical, but the four-cylinder turbo engine and dual-clutch gearbox are complex, and the ride is firm. The SL and GT Roadster are the open-top options.

The M156 engine is the one to research carefully. Early cars had head-bolt failures, and the camshafts and lifters can wear. A car with a documented rebuild or updated head bolts is worth more. A cheap M156 car with no history is a gamble.

Service costs are higher than a standard Mercedes, and tyres and brakes wear quickly. Budget for a specialist inspection and a contingency fund. These cars are cheap to buy and expensive to own.

The newest C63 uses a four-cylinder hybrid, which is a different ownership proposition and has not yet built a long-term reliability record.

A compression test and a fault-code scan are worthwhile on any M156 car.

How this profile was compiled

This profile uses Mercedes-AMG's published model history, service information, owner reports from MBWorld, and current UK market listings. It is not a road test.