My Mercedes Benz C220 comes with the carmaker's Maintenance System, so servicing my sedan has been way too easy since day 1. Lately, I think the system has accidentally reset. What should I do? Can I perform the resetting all by myself?

You shouldn't tinker the system by yourself. What you should do instead is to contact your dealer or the nearest authorized Mercedes Benz center and asked the experts to correct the problem. Resetting the system is only advisable if proper maintenance service has been done. If you make the mistake of resetting it without carrying out the necessary maintenance regimens, the engine or other vehicle components can get damaged, and if this happens, the damage will no longer be covered by the Mercedes Benz New Vehicle Limited Warranty.

I heard tire rotations can't be done in all vehicles. Is that true? Can I perform such trick in my Mercedes Benz C220?

Yes, tire rotations can't be performed in all vehicles—it can only be done on rides with the same front-and-rear tire dimensions; it isn't possible on vehicles with different front and rear tire sizes. If the dimensions of your C220's tires are the same, you can properly rotate the tires by observing the rotation pattern of the front and rear tires. Such pattern will maintain the intended tire rotation and direction. On unidirectional tires, there's an arrow on the sidewall indicating the tires' spinning direction. Check your manual for the recommended schedule and intervals of tire rotation, or do so as soon as the first sign of uneven tread wear is observed.

What are the recommended types of engine oil for my C220?

You can check your manual for the specific type and grade of oil required by your engine. If your C220 comes with the MB Maintenance System, you can't go for the conventional petroleum-based oils. You must never use oils and filters that aren't required by such system or else your warranty will be nullified. Using oil additives and changing of oil and filters longer than the system's recommended intervals are also not covered by the Mercedes-Benz New Vehicle Limited Warranty.

Can you give me some tips on how I can improve my sedan's fuel efficiency so I can spend less money on gas and without spending some for new parts and add-ons?

You can reduce your ride's fuel consumption by simply maintaining some of the factors and components that directly affect the vehicle's performance. Proper tire inflation, for one, gives a 3% increase in fuel efficiency; so make it a point to monitor your tire pressure regularly. It also pays to check your air filter regularly and replace it at the right interval as a dirty air filter hurts the vehicle's fuel economy big time. You should avoid driving on dusty roads so as not to shorten the service life of the air filter. Lightening your car's load also pays big time when it comes to fuel economy. Get rid of the heavy stuffs on the trunk especially if you don't use them often. Remember that any extra 100 pounds you put in your ride increases the fuel consumption by 1 to 2%. You can also save fuel by keeping your fuel tank quarter full. Running on low fuel just put a lot of stress on the fuel pump. Avoiding stop-and-go city driving can also helps you get better fuel mileage.

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