In this guide, you will find step-by-step instructions with pictures and video on how to change Mercedes-Benz serpentine belt. For instructions on how to change belt and tensioner, follow our guide on How to change Mercedes-Benz tensioner.
The instructions on how to change Mercedes serpentine belt (also known as Drive Belt, Poly V Belt) apply to all Mercedes-Benz cars with six and eight-cylinder gasoline engines such as M112, M13, M272, M273 etc. Changing Mercedes-Benz serpentine is an easy task, and requires less than 30 minutes.
Symptoms that you need to change your Mercedes-Benz serpentine belt include squealing noise (most noticeable at startup). The serpentine belt may show signs of cracks, damages ribs. Other possible symptoms include powering steering noise, poor air conditioner, and even battery warning light. Do not ignore your serpentine belt if it shows signs of damage. If the belt comes off when the engine is running, it can cause unnecessary damage to engine components.
It costs less than $50 to change the Mercedes-Benz serpentine belt yourself. Average cost to change the belt at the dealer or mechanic ranges between $100 and $250 for labor and parts.
Typical routing of Mercedes Benz serpentine belt. Whenever possible take a picture or draw a sketch of the old belt routing before removal. The drive belt routing diagram may be printed underneath the hood or top of the radiator support.
Instructions on how to change Mercedes-Benz drive belt apply to the following models. These instructions may apply to other models not included in this list.