What Does Mercedes-Benz B Maintenance Include?
3 Answers
Mercedes-Benz's A maintenance generally involves changing the engine oil and oil filter; B maintenance includes replacing the air filter and cabin air filter, in addition to the items covered in A maintenance. The maintenance categories for Mercedes-Benz are as follows: A Maintenance: Engine oil, oil filter, lubrication maintenance, windshield washer fluid top-up, full vehicle fluid inspection, computer diagnostics, drainage check, tire tightening, tire pressure (5 tires), chassis inspection (suspension, brake discs, pads, and all chassis components), interior inspection (horn, headlight washer, seat belts, interior lights, cigarette lighter, and all functions), battery check, resetting maintenance and tire pressure warning lights. B Maintenance: Adding air filter and cabin air filter replacement, air conditioning sterilization, sunroof lubrication, intake manifold and throttle body cleaning without disassembly, plus all A maintenance items. C Maintenance: Essentially the same as A maintenance, as Mercedes-Benz alternates between A and B maintenance. Extended Maintenance: Includes more items beyond B maintenance, such as full vehicle fluid replacement, fuel filter, pulley set, spark plugs, carbon deposit cleaning, etc.
When it comes to Mercedes-Benz B-service items, I've noticed many people aren't actually clear about the specific procedures. The standard operation involves changing the engine oil, oil filter, air filter, and cabin air filter—these are the basic three-item routine. However, B-service includes several key additional items compared to A-service: the technician will carefully inspect the brake pad thickness, especially the wear on the front wheels, test the brake fluid's moisture content to determine if replacement is needed. For Mercedes models equipped with active braking systems, the brake system sensors also need to be checked. Spark plugs are replaced every 40,000 km, so during B-service, they'll typically examine the electrode condition. I've seen cases where owners thought it was just an oil change, only to discover their brake pads were nearly worn out without realizing—this is definitely not an area to skimp on. Finally, I recommend keeping an eye on them to check for leaks in the chassis bushings and shock absorbers, as rubber component aging is a common issue with German cars.
The Mercedes-Benz B-Service focuses on comprehensive inspections. Changing the engine oil and filter is fundamental, but the key lies in the additional items: replacing the air filter to ensure clean air intake and the cabin air filter to prevent odors. The technician must use a diagnostic computer to read all vehicle fault codes, with special attention to the 48V mild hybrid system battery status. If the brake fluid moisture content exceeds the limit, it must be replaced, and brake pads with a measured thickness below 3mm should be prepared for replacement. Many owners overlook tire rotation, which is actually included in the B-Service. Once, I discovered slight oil leakage in the right rear shock absorber, and timely action prevented greater damage. It's advisable to additionally request an inspection of the sunroof drainage pipes, as blockages can lead to interior water damage.
