Mercedes W204 Belt Diagram (2024)

FAQs

Where is the serpentine belt routing diagram? ›

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. If there is no diagram, make a sketch of the belt and pulleys before removing the belt. This will help you re-route the new belt correctly.

As you can see, one belt serves the A/C compressor, one belt serves the air or smog pump, one belts serves the alternator and two belts serve the power steering and water pump.

Serpentine belts have been used since the 1980s and are one so-called “fan belt” that operates the air conditioning, water pump, alternator, power steering pump, and fan if it's not electric. They're flat, wide and have a spring-loaded tensioner on a pully to keep them from slipping.

The Mercedes-Benz C-Class (W204) is the third generation of the Mercedes-Benz C-Class. It was manufactured and marketed by Mercedes-Benz in sedan/saloon (2007–2014), station wagon/estate (2008–2014) and coupé (2011–2015) bodystyles, with styling by Karlheinz Bauer and Peter Pfeiffer.

As an example, “8PK2515” is the PK number found on an OEM serpentine belt. The first digit indicates an eight-rib belt, followed by “P” to identify metric belt sizing, and a “K” showing that this belt conforms to the SAE standard for rib sizing (3.56 millimeters wide for automotive-type serpentine belts).

A timing belt has deep, horizontal ribbing. Whereas, a serpentine belt has thinner grooves that run vertically. If you drive an older, high-mileage vehicle, you should be extra careful with these belts. Eventually, they will need to be changed.

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.

The reliability has been really good with only the common faults really being an issue for me: 1 Fuel injector gave in and stopped partially working putting the car in limp mode.

While 100,000 miles used to be regarded as high mileage, hitting six digits no longer means your vehicle is at the end of its life. Today, thanks to advances in technology, many Mercedes-Benz vehicles can last well beyond the 100,000-mile mark with proper care.

What does AMG stand for? ›

Mercedes-Aufrecht, Melcher and Großaspach

Mercedes-AMG / Full name

If the belt is already out of place, locate the driver's manual or the under-the-hood placard, where you'll find a sketch of the routing.

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 Does a Serpentine Belt Do? As we mentioned early, a serpentine belt delivers power to your alternator, power steering pump, and air conditioning compressor. In some cases, it also supplies power to your water pump. It's a long, winding rubber band of sorts that is attached to your crank pulley.

The smooth side goes against the pulleys.