Most automakers recommend replacing the timing belt every 60,000 to 105,000 miles. Timing chains are heavier and more complex than timing belts, but they also last much longer. Like timing chains, timing gears are strong, accurate and last a long time.

As with any used car, have it checked by a reliable mechanic first. Oh, and another thing, these 3.8s have timing chains, rather than timing belts. That means you shouldn’t have to worry about replacing the timing belt like you would when buying a used car with a belt.

If you have a 4-cylinder model from 2003-2007, you engine has a timing chain; if you have the V6 model from those years, it’s a timing belt. From 2013-2017, the 4-cylinder models still have a timing chain and the V6 models have a timing belt.

While not all vehicles use timing chains, most Mercedes-Benz vehicles (especially those powered by higher-displacement engines such as the C-Class) do. In terms of function, there’s no difference – both serve the same purpose of synchronising the camshaft and crankshaft in your engine, preventing engine valve failure.

Timing chain is an internal component and should not be changed unless the engine goes bad…. You have to dismantle the engine to change it. It should not wear under normal use…just like you would not change the pistons as a maintenance job….

The Best in Auto Repair The average cost for a Mercedes-Benz E350 timing chain tensioner replacement is between $1,032 and $1,231. Labor costs are estimated between $761 and $960 while parts are priced at $271.

Changing a timing chain is not outright difficult but is considered a complex job due to the large number of steps involved.

Replacing the timing chain is a complicated job, and the labor costs can be quite high. For most cars, a timing chain replacement costs between $413 and $1040, or you can order the parts themselves for $88 and $245.