Same dillema, how do I reset the Service B message in a MB ML350?

you need to use the diagnostic program too do this step after a full service
ie check and replace brake pads and fuel filters paper filter oil and fluids and filters then reset its ecu

try to ask the local garages who has the right cable and tools and ask them to either do the full service and reset it
or reset it if youve done a service
this only comes on at a major service point or if the ecu detects an issue so is not just a short service
anything from worn pads to bad oil presure can cause this too trigger as well as miles count

Hello, The Wrench is telling you that your car is due for Service, Simply an oil change and some inspections are due. The 2D means that the service is due in 2 days. Hope that helps, You can go to a Mercedes dealer but they are way over priced, I would recommend finding a local independent Mercedes shops. Usually they are run by Technicians who worked at the dealers anyway. Just FYI.

They may have added too much oil -- a 2004 MB ml350 with a 3.7L engine should take only 8.5 Quarts (including what goes in the oil filter) -- Exactly 8.5 Quarts, no more, no less. You may be able do check the oil level by using the onboard computer - pushing the buttons on the steering wheel - follow the directions in the owners manual on how to check the oil level.

Mercedes uses a service schedule with the letters A-H to denote the relevent maintenance recommended.A is the basic oil service and H is the most inclusive.The intermediate letters correspond to proportional services.The service light should be reset at the completion of the service.This can be done via interface or using the controls and menus on the steering wheel.The specific format for resetting is different for different years and models.Alldata is fairly accurate for reset guidelines,but is not correct on some.Make sure to use synthetic oil in all newer MB,especially with extended oil change intervals.

according to my alldata book a 2007 model can only be reset by the dealer ,but look on some of the chinese automotive software sites on the web as no doubt they may have cracked it and produced a small unit to clear the service inspection light by now

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Reset Service Indicator
1. Insert key into ignition, switch to position "1". The mileage counter has to be
displayed.
2. Press repeatedly until the TRIP option is highlighted.
3. Press and hold and within 1 second press and hold both for 5
seconds. The shop menu is displayed.
4. Press repeatedly until "Assyst Plus" is highlighted and confirm with .
Options "Service Data" and "Full Service" are displayed.
5. Press until "Full Service" is highlighted. Confirm with .
6. Press until "Conf. Full Serv." is highlighted, confirm with . The display
shows "Service carried out?."
7. Press to select "Yes". Confirm with . "Cannot be undone" displays.
8. Press until "Confirm" is highlighted. Confirm by pressing . The display
reads "Full Service carried out".
9. Confirm by pressing .
MB

Regards, Lee Davidian

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In the owners manual should be a self reset procedure. If you cant find it hop on over to benzworld.org and look around.

Reset “wrench” service light

1.) Turn the key to the on position (do not start car)
2.) Press trip reset button 3 times until service shows
3.) HOLD DOWN reset button
4.) WHILE HOLDING button, turn key off
5.) While key is in off position release the button and repress
6.) Turn key back on holding down the reset button
7.) Wait until service resets

This has to be done in 10 seconds. It may take a couple tries.
Variations include...make sure door is shut and car in neutral.

this needs to be done by a mercedes dealership/garage

oil change might not have they obd2 tester to shut
the light go to auto parts chain store like autozone
tell shut it up for you for free