Credov's researched list of the 2 faults the Mercedes-Benz GL450 is known for (2006–2011), 2 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: If possible see the car after it has sat overnight, and check every corner sits level at the same height.
Why it matters: A leak overworks the compressor until it overheats and fails too, often around 130,000-150,000 km, so an affected GL without receipts should be budgeted for both struts and a compressor.
What to look for: With a torch, look down the back of the engine and at the gearbox bellhousing for wet, dusty oil.
Why it matters: The seals themselves are cheap, but the job means stripping the top of the engine, making it a big labour bill, and even revised seals have been reported leaking again on some cars.
Got a question about a Mercedes-Benz GL450? 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.