2nd Generation Mercedes-Benz CLS Class Cold Engine Start Up Noise

The Mercedes CLS C218, built by German manufacturer Mercedes-Benz is a large luxury sedan highly praised for its style and dependability. Famous for its German engineering, the Mercedes C218 offers a wide variety of engine sizes with BlueTEC technology, designed to increase engine efficiency. Although the BlueTEC engines are a great advance in vehicle manufacturing, many Mercedes owners can be frustrated by issues they experience with them.

A common complaint from Mercedes-Benz C218 owners is a phenomenon called ‘cold engine start up noise.’ These drivers report a loud metal on metal sound when they first start their engines, and is often described as a metallic grinding. This is found on both new and used models and could also be accompanied by a rough running engine. As the vehicle’s engine becomes warm, the noise and rough ride subsides.

Because the noise goes away after a minute or two, often Mercedes owners do not find it a priority to have their vehicles evaluated by a professional. This is a grave mistake because the underlying cause is often bearings in the engine grinding, causing the metal on metal noise. Mercedes-Benz is aware of this issue and has issued a service bulletin in conjunction with it.

The repair for this problem is replacing the bearing with over-sized bearings in the engine, and can be very costly if not covered by the service bulletin. For this reason, we recommend a visit to your local Mercedes-Benz service center for diagnosis and repair of the system. They can evaluate your vehicle and inform you if your vehicle would be covered under the technical service bulletin.

Search for a local, independent Mercedes-Benz repair shop with Mercedes-Benz mechanics that have dealer-level expertise at a fraction of the expense.