The functionality of the fuel system inside your Mercedes is critical to how it performs daily. The improper amount of fuel to the engine can cause it to run too lean or too rich, with both scenarios causing problems in the engine. Without knowing how much fuel you have in your tank is annoying...

A vehicle’s subframe is critical to the driveline and suspension. The suspension, engine, and differential are all mounted to the subframe, while the subframe itself mounts to the chassis. Like all of the components that bolt to it, the subframe uses bushing to bolt to the chassis. Over time,...

A properly running engine is one that is running at the correct temperature. The only way you and the ECU will know its at the proper temperature is through its coolant temperature sensor. The simple sensor relays the exact temperature to the engine and coolant temperature gauge to show you when...

Keeping track of your the age and condition of your oil is an essential part of owning an Audi B8/B8.5 with the 4.2 L V8 engine like the Audi S5. The oil’s job is to keep everything inside the engine lubricated and happy. As the oil is used, its lubricating properties fade, leading to increased...

No matter what position of your vehicle they are, the condition of your brakes is incredibly important. Without them, you’re a liability to yourself and everyone around you. On all cars, including the Mercedes W211 and W212, the brakes will be larger at the front to prevent the rear of the car...

The condition of the rubber windshield seals on your vehicle directly correlates to how dry the interior of your vehicle is. The BMW E90 has notoriously bad windshield seals that crack and flake off over time. Once they flake off, they allow moisture to get between the chassis and windshield, and...

This is the final part of our 3 part BMW E46 M3 rear subframe overhaul DIY. Part one of the DIY covered the entire removal/teardown process, part two covered installation of the new components, and part three covers the re-installation process once the bushings and mounts are replaced. BMW E46 M3...

This is part two of three of the BMW E46 M3 rear subframe overhaul DIY. Part one of the DIY covered the entire removal/teardown process, setting up part two for the next steps of replacing the various suspension components. Part three covers the re-installation process once the bushings and...

The rear subframe, in any car, is a significant component. The subframe acts as a mounting point for all of the rear suspension components and the rear differential. Its made to withstand all of the drivetrain's twisting forces while carrying the load from the suspension components. The subframes...

Modern technology makes life easier, in a sense. We advance as we look at the best of what we have and improve it in all areas we can—cars are no different. When the ZF 8HP transmission debuted in 2009, it became the go-to automatic transmission to use. Automakers from Alfa Romeo to BMW,...