DIY Scheduled B-Service Notes
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From: Colorado
G550
DIY Scheduled B-Service Notes
Approaching 20K miles on my 2019 G550, I recently performed a B-Service maintenance, which is an A-Service plus a brake fluid flush and replace. There are many YouTube videos that demonstrate the brake fluid procedure, and I'll post a few related notes in a future forum contribution. But for now, I wanted to comment about a couple service items -- power steering fluid and the fuel filter.
The A-Service and B-Service specify fluid inspections, and I had never located a a power steering fluid reservoir. Turns out there is none. MB WIS (workshop information system) document GF46.35-P-9997GW provides an overview of the system components for the electric power steering of the 2019+ G-Class. Being electric, there is no fluid and there is no scheduled maintenance. I didn't know this, and thought a few others might not either.
I also found WIS documents AP47.20-P-0780GB (Replace Fuel Filter) and AR47.20-P-5710XGA (Remove/Install Fuel Pump) that illustrate the location and procedure for replacing the fuel filter. This is not surgery you want to do regularly as it involves removal of the fuel tank, and removal of the fuel pump and filter that are mounted therein. I dug a bit deeper into the topic of fuel filtration and why a fuel filter would be made so inaccessible, and found some interesting information about fuel filtration at dispensing stations. Every state establishes its own standards for fuel dispensing stations, and most are based on NIST (formerly the U.S. Bureau of Standards) Handbook 140. This specifies filtration at the dispensing pump to 10 microns (for all grades and blends of gasoline), which is on the same level of filtration as an automobile fuel filter. So gasoline from a dispensing station is already well filtered. As long as contamination is not introduced from dirt around the filler neck, from a dirty gas can, or from a contaminated fuel additive, it would seem that the in-tank fuel filter should last a very long time and remain maintenance free. More info on this topic can be found at clearpetrol.com.
Whether or not you maintain your own car or take it to the dealership, it's always good to know a bit about how things tick.
The A-Service and B-Service specify fluid inspections, and I had never located a a power steering fluid reservoir. Turns out there is none. MB WIS (workshop information system) document GF46.35-P-9997GW provides an overview of the system components for the electric power steering of the 2019+ G-Class. Being electric, there is no fluid and there is no scheduled maintenance. I didn't know this, and thought a few others might not either.
I also found WIS documents AP47.20-P-0780GB (Replace Fuel Filter) and AR47.20-P-5710XGA (Remove/Install Fuel Pump) that illustrate the location and procedure for replacing the fuel filter. This is not surgery you want to do regularly as it involves removal of the fuel tank, and removal of the fuel pump and filter that are mounted therein. I dug a bit deeper into the topic of fuel filtration and why a fuel filter would be made so inaccessible, and found some interesting information about fuel filtration at dispensing stations. Every state establishes its own standards for fuel dispensing stations, and most are based on NIST (formerly the U.S. Bureau of Standards) Handbook 140. This specifies filtration at the dispensing pump to 10 microns (for all grades and blends of gasoline), which is on the same level of filtration as an automobile fuel filter. So gasoline from a dispensing station is already well filtered. As long as contamination is not introduced from dirt around the filler neck, from a dirty gas can, or from a contaminated fuel additive, it would seem that the in-tank fuel filter should last a very long time and remain maintenance free. More info on this topic can be found at clearpetrol.com.
Whether or not you maintain your own car or take it to the dealership, it's always good to know a bit about how things tick.
