Mercedes E-Class W211 (2002-2009): known problems and buying guide

Before you buy

1. Ask for proof that the M272 or M273 chain was replaced, and whether the balance-shaft gear was done. Bad result: no proof, or a knock from the engine.
2. Check the car after it has stood overnight. A sag or a "car too low" warning points to a leak. A scanner reads compressor run time: 40-80 hours per 100,000 km is normal, over 200 hours means a leak. Two rear bellows cost 2,500-3,500 EUR (Germany, year not stated).
3. On cars built 2002 to 2006, a scanner reads the SBC pump run time. Bad result: a red brake warning, a pump that runs over 15 seconds to reach pressure, or an accumulator that holds pressure for less than 30 minutes. A new unit costs about 1,200 EUR in parts plus 3-5 hours labour (Germany, year not stated).
4. Start the car cold and listen for a rattle at the timing cover. Ask whether the chain and sprockets were changed. Bad result: a rattle.
5. Look for fresh oil at the back of the engine and in the coolant. Bad result: oil in the coolant. The intake flap actuator repair is just under 2,000 EUR (Germany, year not stated).
6. Listen for a knock at idle, and check the crank pulley for play. Bad result: a loose pulley. This can cause major engine damage.
7. Turn the wheel lock to lock, then drive over bumps. Bad result: play in the steering or knocks from the front joints. Steering play is typical after about 300,000 km.
8. On a lift, check the rear wheel arches, sills, lower door edges and tailgate for bubbling or holed metal. Check the boot for water. Bad result: holes, or water that corrodes the rear electronics box (SAM).