SL/R231: Decoding The ASSYST PLUS Sub-Codes/Service Items
Thread Starter
Senior Member
Joined: Oct 2019
Posts: 293
Likes: 153
From: Nova Scotia, Canada
2019 SL450; 2023 M850i coupe
Decoding The ASSYST PLUS Sub-Codes/Service Items
Does anyone know what the “ASSYST PLUS Sub-Codes (Service Items) are for the 2019 SL450?
The Service Items codes are displayed in the instrument cluster when you are in the ASSYST PLUS menu to advise what services are due.
I searched and found the following on the internet, and although it looks legit, I’m hoping the experts here will verify.
“ Service codes for the Mercedes-Benz R231 SL-Class (2012–2020) are managed by the ASSYST PLUS system, which indicates when maintenance is due. These codes are generally divided into Service A (minor) and Service B (major), further detailed by sub-codes (0–9) that specify which components need attention.
Here is a breakdown of the common service codes and items for the R231:
1. Main Service Intervals
When checking the "Full Service" menu in the instrument cluster, you may see numbers 1–20. For the R231, these often correspond to:
Given the features of the R231 SL-Class, the following are often included in these codes:
The Service Items codes are displayed in the instrument cluster when you are in the ASSYST PLUS menu to advise what services are due.
I searched and found the following on the internet, and although it looks legit, I’m hoping the experts here will verify.
“ Service codes for the Mercedes-Benz R231 SL-Class (2012–2020) are managed by the ASSYST PLUS system, which indicates when maintenance is due. These codes are generally divided into Service A (minor) and Service B (major), further detailed by sub-codes (0–9) that specify which components need attention.
Here is a breakdown of the common service codes and items for the R231:
1. Main Service Intervals
- Service A (Minor Service): Usually due first, followed by every 20,000 miles or 2 years.
- Service B (Major Service): Typically due at 20,000 miles or 1 year after the previous service, then every 20,000 miles/2 years.
When checking the "Full Service" menu in the instrument cluster, you may see numbers 1–20. For the R231, these often correspond to:
- Service 1: Minor Basic Service (Service A)
- Service 2: Major Basic Service (Service B)
- Service 3: Engine Oil and Filter Change
- Service 4: Brake Fluid Exchange
- Service 5: Combination Filter
- Service 8: Air Filter
- Service 11: Fuel Filter
- Service 12: Spark Plugs
- Service 13: Coolant Flush
- Service 20: Automatic Transmission Oil and Filter
- Service Combinations (Examples)
- A0 / 505: Basic Service A (Oil + Filter + Inspection).
- A1 / D0D: Service A + Combination Filter.
- A4 / D50J: Service A + Spark Plugs (common on high-performance models).
- A7 / G50M: Service A + Brake Fluid Service.
- B0 / 1607: Basic Service B.
- B4 / B60H: Service B + Spark Plugs.
- B7 / G60N: Service B + Brake Fluid Service.
Given the features of the R231 SL-Class, the following are often included in these codes:
- Active Body Control (ABC) / Suspension Check: Checked during Service B.
- Panoramic Roof Service: Lubrication and cleaning (Service 10).
- V-Belt Inspection: Part of the Service B check.
Thread Starter
Senior Member
Joined: Oct 2019
Posts: 293
Likes: 153
From: Nova Scotia, Canada
2019 SL450; 2023 M850i coupe
