Optima Battery For Top Diesel Performance

We are so impressed with Optima batteries, that we recommend every owner put one in their Mercedes diesel. They hold their charge forever, they produce much more cranking power than a lead acid battery, and they do not gas out. This alone is worth the price. That means no more battery terminal corrosion and very little battery box rust. Now be forewarned that these batteries do not fit perfectly in your battery box tray - but they will work. We prefer the Model 34 red top. You will need to purchase a longer ground cable at your local auto parts store to allow the cables to reach the terminals. You may also need to fabricate a plastic cover to protect the exposed terminals from shorting out. Let me tell you. Your engine will spin like it never has before!

Diesel batteries normally do not last their full warrantee period. Before yours runs out replace it with an Optima. At the same time clean all your battery connections, especially at the cable to body connection and at the starter. Even if you battery posts appear to be clean, remove them and clean them with a battery post brush. If your cable end clamp bolts are rusty replace them. Rusty bolts will fool you ie they may feel tight with your wrench but will not be putting adequate pressure on the post clamp.