Hi,

I'm sure this has been asked plenty of times but I cannot find the answer. My e class is saying a b3 service is due. I have it booked in. Is there a list of these codes and what needs doing at each interval. So is there an explanation of each service code?

Thanks
G

 

Some say it means the 3rd B service. Others say it codes the specific items that need attention. I’ve had as high as a 9 (A9), but I don’t believe any of it. So many services are taken out of sequence like plugs, transmission, brake fluid, coolant, etc. which may happen based on years vs mileage I don’t think any of these A-B codes mean squat. You need to follow the maintenance schedule for your specific vehicle and keep your work orders so you know what has been completed. I guarantee if you ask the SA what those numbers mean they will give you a vague answer and then try to sell you something you probably don’t need.

 

For some reasons finding clear service scope is not easy, so get used to it. This is what I saved few years ago , so see how that can work for you?

 

I took the Mercedes service schedule for my 2016 E350 4matic wagon and reorganized and condensed it to this:


“A” Service at 12 months or 10,000 miles, then every 2 years or 20k (eg, odd 10k intervals)
“B” Service at 24 months or 20,000 miles, then every 2 years or 20k (eg, even 10k intervals)

Every 10k miles or year (A and B)

• Read service data, reset ASSYST PLUS display (A,B)
• Oil and filter change (A,B)
• Check brake fluid level (A,B)
• Check coolant level (A,B)
• Inspect tires (A,B)
• Inspect brake pads, rotors (A,B)
• Check/correct tire pressure (A,B)
• Check/correct spare pressure (A,B)
• Check warning/function lights (A,B)
• Check interior and instrument lighting (A,B)
• Check horn (A,B)
• Check washer fluid (A,B)
• Check exterior for visible damage (A,B)
• Check windshield for damage (A,B)
• Check wiper blades (A,B)
• Check first aid kit expiration (A,B)
• Clean visible area of water deflector (A,B)
• Check parking brake (A,B)
  

Every “B” (20k miles or 2 years)

• Check exterior lighting (B)
• Check wipers,washers (B)
• Replace charcoal interior dust filter (B)
• Check poly V belt for wear (B)
• Check vehicle underside for leaks,damage (B)
• Check tires for damage/cracks (B)
• Check condition of steering, tie rods (B)
• Check front axle and ball joints (B)
• Check rear axle and ball joints (B)
• Check spring/strut/shocks (B)
• Check drive shaft flexible couplings (B)
• Check power steering fluid (B)
  

Note, 30K service ‘A’ performed at 28770 by MB of Santa Fe

Additional work:

• Replace brake fluid - every 2 years
• Clean/Lubricate Panoramic Roof - every 30K/3 years
• Replace engine air filter - every 50k/5 years
• Replace spark plugs - every 50k/5 years
• Replace ATF oil/filter - every 60k/6 years
• Replace fuel filter - every 150k/15 years