Credov's researched list of the 5 faults the Mercedes-Benz A 45 AMG is known for (2013–2020), 5 of them serious or costly. Each one says what to look for when you check the car, so you can spot it before you buy. Not every car has these faults: they are the ones worth checking on this model.
What to look for: Ask for the build date and turbo invoices, then listen for a siren-like whine under boost.
Why it matters: A failing turbo bearing can shed debris into the engine, and a replacement turbo on these AMG models is a major expense.
What to look for: Drive slow full-lock circles both ways, feeling and listening for a clunk, grinding or oil leak.
Why it matters: A failing rear differential can lock the rear wheels while driving, and replacement is a major cost on these all-wheel-drive AMG models.
What to look for: With the engine cold, check the coolant level and look for crusty residue around the thermostat housing.
Why it matters: Left unchecked it causes ongoing coolant loss and temperature swings, and the housing is a long job to replace because other parts have to come off first.
What to look for: From a cold start select reverse then drive a few times, listening for a metallic crunch.
Why it matters: A genuine metallic crunch that the latest software does not fix points to worn synchros or clutch packs, which is an expensive gearbox repair on these AMG models.
What to look for: With the wheel on full lock, torch the inner rim of each wheel for hairline cracks.
Why it matters: A cracked wheel can fail suddenly at speed, and a genuine replacement AMG wheel is expensive.
Got a question about a Mercedes-Benz A 45 AMG? Ask Credov: a noise, a warning light, a part or how to fix it.
On top of the faults above, every Credov inspection covers the basics: fuel smell, leaks or filler rust, engine oil leaks, power steering fluid leak, drive belt cracks or squeal, rust underneath: chassis and mounts, engine mounts, engine oil level and colour, coolant level, colour and leaks, head gasket failure signs, cold start: rattle, knock or smoke, rough or hunting idle, engine running hot on gauge, gearbox or diff oil leak, swapped gearbox without lvv and more.
Researched by Credov from manufacturer recalls and service bulletins, owner reports and workshop sources. Repair prices are typical ranges, not quotes. See also fault codes and repair costs.