Is the W203 reliable?

All W203 engines are fitted with timing chains, which normally don’t have a specified replacement interval. The timing chains in the W203 are generally reliable, with some exceptions, but they will not last forever.

Is Mercedes diesel engine reliable?

The internal components are very sturdy, and diesels operate at lower rpm than gas engines. Sharon Oehler’s Mercedes 300d has gone a long way so far and shows no signs of slowing down, even though it’ll be 30 years old next year. Experts say the diesel engine could last 300,000 miles, and in some cases 500,000 miles.

Is M272 a good engine?

Overall, the M272 is generally less reliable than an average car. It’s not all bad, but there are a few serious issues that can lead to costly repair bills or complete engine failure. Fortunately, only the early 2004-2008 M272 engines are plagued with the balance shaft failures.

Is the Mercedes 3.5 V6 a good engine?

A 3.5L naturally aspirated V6, 3.0L twin turbo V6, and 3.5L twin turbo V6. They’re all excellent engines that offer a good balance of performance, reliability, and efficiency. However, no engine is perfect and that applies to the M276 as well. Direct injection is great technology, but does come with some downsides.

What is a balance shaft in an engine?

[149 Pages Report] A balance shaft is designed to rotate and vibrate in a way that reduces the vibration produced by an engine. Balance shafts are commonly used for engine refinement. Four cylinder engines use a tow shaft, which turns in opposite directions on either side of engine’s crankshaft.

Which is better OM646 or OM647 engine?

Go for the OM646 2.15L 4cyl. engine, or the OM647 2.7L 5cylinder engine (badged as 200/220cdi and 270cdi respectively). These were the refined versions of the 611 and 612 engines, with all the issues ironed out with better mpg and emissions.

Are there any problems with the Mercedes OM642 engine?

In general, the OM642 engine has proven to be quite reliable. But near a mileage of 100-150k miles, auxiliary engine systems start to fail. The first thing that starts to fail on this engine is the crankcase ventilation system.

How often should I clean my Mercedes OM642 diesel engine?

Therefore, for vehicles equipped with an OM642 3.0L diesel engines, it will be helpful to clean an air intake manifold, intake pipes, and crankcase ventilation pipes every 60-80k miles. Otherwise, the swirl valves may be stuck and an overloading electric drive motor will blow a fuse that controls other sensors.

What is the reliability of a test score?

The reliability of test scores is the extent to which they are consistent across different occasions of testing, different editions of the test, or different raters scoring the test taker’s responses.