How to Repair a Mercedes Benz E Class 320

Written by david mcguffin
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How to Repair a Mercedes Benz E Class 320
Knowing a little about automechanics can help to troubleshoot problems with your Mercedes. (Front-light of black mercedes image by Mladenov from

A variety of problems can prevent your Mercedes Benz E Class 320 from working properly. Knowing a little about basic automobile mechanics can help to perform much of the work yourself. Some problems can be fixed yourself, while others require contracting a professional mechanic who specialises in Mercedes. Vehicle repairs can take several hours each, depending on the skill and experience level of the person doing the repair as well as the nature of the repair itself.

Skill level:

Things you need

  • Socket wrench set
  • Wrench
  • Torque wrench
  • Jack stands
  • 1.5 ton floor jack
  • C-clamp

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  1. 1

    Locate the starter by tracing the positive battery cable, which splits and travels to the alternator and starter motor. You will know that the starter needs replacing if your battery is still working, but you only hear a "whirring" and a click whenever you turn your ignition key. Disconnect the negative battery cable and unhook the electrical connection leading to the starter. Use a socket wrench to remove the two mounting bolts for the starter and unscrew the brass nut securing the positive battery cable feed. Insert a new starter into the Mercedes E Class 320.

  2. 2

    Replace the brake pads on your E Class 320 by lifting the car with a floor jack and supporting it with jack stands. Remove the tires. Unbolt the caliper and unscrew the brake pad retaining bolt. Replace the brake pad and secure it by tightening the retaining bolt. Use a C-clamp to push the caliper piston back into place and reinstall the brake pad assembly. If the rotor is showing discolouration, bumps or grooves, remove the rotor and have it resurfaced at an auto parts store. Reinstall the rotor. Reattach the caliper to the rotor.

  3. 3

    Fix oil leaks in your Mercedes Benz E Class 320. Check the oil level by wiping the dipstick clean and reinserting it into the dipstick tube. Pull the dipstick out again and locate the oil level indication using the "max" and "min" lines printed on the lower end of the dipstick. Pour in an oil additive as a thickening agent or use a heavier weight oil to help stop leaks. Replace the valve cover gasket by unbolting it from the lower valve cover. Pull out the old gasket and replace it with a new one. Use silicone to help create a tight seal between the upper and lower valve cover. Reinstall the top valve cover.

Tips and warnings

  • The valve cover gasket replacement should serve as an example for replacing other gaskets that may be leaking.

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