BO SERVICE FOR C250-CDI W204
 

I own a Merc Benz C250 – 2011/2012 CDI (Diesel) W204 edition. The car has run 97758 Kms. I am due for annual servicing as per the warning indicator. Here are some details that provides a background to my query below;

1. Warning Indication – Due for BO Service
2. Current Mileage – 97758 Kms
3. Mileage done since last service – 5735 Kms
4. Date / Time period of last service – 1 Year, 11 August 2017
5. What was replaced during my previous service - Engine Oil Replacement; Filters Replacement - Oil Filter; Air Filter; Diesel Filters replaced

I have the following queries;

1. What is BO Service and what does a BO Service entails
2. I had replaced Oil Filter; Air Filter; Diesel Filters and Engine Oil in 1 year ago, which of the filters / oil need to be replaced given that the vehicle has run 5735 Kms in the last 1 year since filter / oil replacement
3. Is it mandatory to replace filters and oil every 1 year given that the vehicle has done around 5700+ Kms only in the last 1 year

I shall appreciate receiving advice and suggestions from experts in this group

Regards

Krishnan P S
Chennai, India