2009 Mercedes C300 Belt Diagram (2024)

FAQs

How much does it cost to replace a serpentine belt on a Mercedes c300? ›

Labor costs are estimated between $94 and $118 while parts are priced between $29 and $42. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed. For a more accurate estimate based on your location, use our Fair Price Estimator below.

Some vehicles have the serpentine belt diagram located on a decal somewhere in the engine compartment. But if your car does not have a decal, you can easily look up the diagram in a repair manual or repair database. Another option is to take a photo of the old belt before removal.

Where can I find a belt routing diagram for my engine? A: Commonly a belt routing diagram sticker is on the underside of the hood or in the engine compartment.

Plus, replacement is relatively easy, and if you're wondering how long does serpentine belt service take, it's less than an hour for most vehicles.

What to do if you have a failing serpentine belt. If you do notice your belt needs replacing, you can do it yourself if you're mechanically minded and have the time. It'll take about 1 or 2 hours, but they're relatively inexpensive and straightforward to repair.

A timing belt has horizontal “teeth” designed to fit the cogwheels of the crankshaft and camshaft. A serpentine belt has V-shaped grooves that run vertically along the belt. Drivers often need to replace these belts around the same time.

This industry standard number, frequently denoted as the “PK” number, is printed next to the manufacturer's part number on almost every serpentine belt produced, and can be seen in the examples below. WHAT IS A “PK” NUMBER? A “PK” number is a worldwide standard metric belt measurement printed on most serpentine belts.

A constant squeal is also possible, irritating you and any other drives around you. At the worst, it could be a harsh tapping or slapping noise that varies with RPMs. These are the telltale signs that something's amiss with your serpentine belt.

Place the target tool (the other part of the laser alignment tool) on the pulley that needs to be checked. Rotate the target pulley and observe if the laser is shining on the target. The laser should meet the target tool right on the dedicated center marking. This indicates a properly aligned pulley.

What happens if a serpentine belt is put on wrong? ›

Misalignment pulleys or tensioner: If the belt is not properly aligned on the pulleys, it can wear unevenly or slip off entirely, leading to its premature failure. This situation usually happens if some of the components have been previously removed, replaced, and not returned in to place properly.

A good “Rule of Thumb,” seek approximately ½ Inch of deflection for a V-belt. To be more precise… The “Span Length” is the distance from where the belt is leaving one pulley, and is completely seated on the second. Seek 1/64 (0.015625) of an inch deflection for every 1 inch of belt span length.

Moreover, Gates provides the following recommendation for inspecting automatic belt tensioners: - With the engine off and cold rotate the tensioner arm through its entire range of motion. Any sticking or roughness indicates wear on the tensioner bearing surfaces and will require replacement of the tensioner.

The average cost for a Mercedes-Benz E320 Serpentine Belt Replacement is between $97 and $143. Labor costs are estimated between $54 and $68 while parts are priced between $43 and $75.

Serpentine belts usually last about 50,000 miles or five years, or in some cases, even up to 100,000 miles. Your belt should be inspected at 50,000 miles, as this is often when you start to see the belt material breaking down.

Despite its unassuming appearance, this integral part keeps multiple components of your vehicle running smoothly, including the alternator, power steering pump, and air conditioning compressor. Ignoring the signs of a worn serpentine belt can lead to severe engine damage and compromise your safety on the road.

One of the earliest signs of a failing serpentine belt is a high-pitched squealing or whining noise, especially during engine startup or when turning the steering wheel. This noise is typically caused by the belt slipping on the pulleys due to reduced tension or deterioration.