M260 (DE20LA) vs M266
Side-by-side reliability comparison
Specifications
Character
M260 (DE20LA)
"The transverse 2.0 turbo petrol in the A 220/A 250, B 250, CLA 250, GLA 250, GLB 250 and the AMG 35 models from 2018. German guides call it robust. Its known weak point is wear of the exhaust valve seats and guides: Mercedes extended the warranty in North America to 15 years / 150,000 miles and the fix is a new cylinder head. Check for misfire codes and ask whether the head has been replaced."
M266
"Mercedes' transverse four-cylinder petrol of the A-Class W169 and B-Class W245 - 1.5, 1.7, 2.0 and 2.0 Turbo. Simple and well regarded: German guides rate every version a buy and it lasts around 300,000 km with care. One parts guide reports timing-chain wear from about 100,000 km, which the German guides do not see. Big repairs mean lowering the engine, so they are costly. Avoid the Autotronic CVT - the gearbox, not the engine, is the weak point."