The BMW 6-series is looking increasingly like a secondhand bargain - here autocar.co.uk guides you through the buying process.
Our expert advice comes from Dermot Dromey, owner of Southampton-based independent BMW servicing specialist Bartley's.
"I'd buy a 3.0-litre, six-cylinder petrol," he says. "They seem to be more reliable than both the V8 and the diesel."
Faulty electric window sensors can cause the electric windows to close slowly - or not at all. Look out for corrosion or discolouration on the window chrome too. But there shouldn’t be any sign of rust. If there is, it’s bound to be a sign of a poor repair.
If it has a head-up display, be sure that it works; malfunctions can result from damage to the car’s wiring loom. Also be aware of auto headlights that don’t switch off and gearbox paddle shifters with bad connections.