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My wife has a 2016 E350 4 wheel drive. It is coming up on the 10 year Anniversary when we bought it. What maintenance would people recommend? I have changed the trans fluid and of course done the oil changes on time. What else from the experts?
2023 E 450 Sedan. 2018 GLC 300. 2013 E 350 Coupe (retired)
Check the service sheet for your model. Spark plugs probably. Differentials. Transfer case? You don't say how many miles. I assume you have done all the air filters. Coolant and brake fluid of course.
Last edited by smiles201; Apr 11, 2026 at 08:25 AM.
My wife has a 2016 E350 4 wheel drive. It is coming up on the 10 year Anniversary when we bought it.
What maintenance would people recommend?
I have changed the trans fluid and of course done the oil changes on time.
What else from the experts?
You are doing well with proactive maintenance instead of repairs (**).
NOTE engine oil really is 5,000.Mi Max - Not when the service flag shows up.
> 50k.Mi is the mark for...:
Sparkplugs + boots
Tranny blue ATF + 4M Xfer
Both differentials 75W-90
Upgrade to "MB-Approved" MOTUL 5W-40 PAO
Replace 4x CPS + Pigtails
(disc brakes service)
Air filter : cabin & engine.
Scan chassis for pending issues
Stay on top of the slow coolant leak developing.
Stay on top of the engine oil level dropping.
-- Inspect standard oil leak on engine front passenger-side between ALT & Upper timing cover.
-- If cover reseal is due then replace weak chain tensioners (near 60kMi).
**: Overall you want to do more frequent 4Matic service than recommended. Upgrade basic drain plugs to magnetic plugs to capture bearing grinds.
Enjoy great MB ownership.
Last edited by CaliBenzDriver; Apr 11, 2026 at 03:35 PM.
Water pump , thermostat ? I know it sounds too prematurely for its mileage but age wise , it may be due . Check suspension components as well . If it were an Airmatic car , I would also recommend a major overhaul too
Happy Driving
Inspect the right (passenger) rear side of the engine for oil leaks.
Also, look at the alternator on the left front of the engine and see if any oil is leaking from the cam covers into your alternator.
Check the oil filter and area for oil leaks.
Generally, look for any oil leaks anywhere on the engine. The areas I listed are very common leak areas.
Inspect your wire harness connections for any sign of oil. Especially the two connectors located at ECU. And the four connectors at the cam sensor and four at the cam adjuster magnet.
Last edited by mercerized; Apr 13, 2026 at 05:49 PM.
You are doing well with proactive maintenance instead of repairs (**).
NOTE engine oil really is 5,000.Mi Max - Not when the service flag shows up.
> 50k.Mi is the mark for...:
Sparkplugs + boots
Tranny blue ATF + 4M Xfer
Both differentials 75W-90
Upgrade to "MB-Approved" MOTUL 5W-40 PAO
Replace 4x CPS + Pigtails
(disc brakes service)
Air filter : cabin & engine.
Scan chassis for pending issues
Stay on top of the slow coolant leak developing.
Stay on top of the engine oil level dropping.
-- Inspect standard oil leak on engine front passenger-side between ALT & Upper timing cover.
-- If cover reseal is due then replace weak chain tensioners (near 60kMi).
**: Overall you want to do more frequent 4Matic service than recommended. Upgrade basic drain plugs to magnetic plugs to capture bearing grinds.
Enjoy great MB ownership.
Hey @CaliBenzDriver ,
I would definitely be considering upgrading to magnetic drain plugs myself.
Where can they be purchased?
Hey @CaliBenzDriver ,
I would definitely be considering upgrading to magnetic drain plugs myself.
Where can they be purchased?
Thanks!!
- Andrew
Hey Andrew here are all the info from where I got mine for nearly $50 USD.
diff.magnetic.plug by Dimple Co.
Company named DIMPLE Products in SCarolina.
Type is a M24x1.5 tapered shape
This stock design self-sealing ie. no washer in use.
There may be other manufacturers and distributors selling comparable products. Not easy to come by matches.
I'm going to pull my diff plug for service in the near after 30k.Mi - I dont mind how much contaminants
my diff is shading as they are no longer chewing up diff bearings.
Hey Andrew here are all the info from where I got mine for nearly $50 USD.
diff.magnetic.plug by Dimple Co.
Company named DIMPLE Products in SCarolina.
Type is a M24x1.5 tapered shape
This stock design self-sealing ie. no washer in use.
There may be other manufacturers and distributors selling comparable products. Not easy to come by matches.
I'm going to pull my diff plug for service in the near after 30k.Mi - I dont mind how much contaminants
my diff is shading as they are no longer chewing up diff bearings.
Sounds like a plan! Thanks so much I actually just replaced my front or rear differential fluid a couple thousand miles ago (I can't remember which one at the moment, front or rear haha-whichever one Mercedes-Benz does not come right out and tell you that you need to change periodically for the W212)
Sounds like a plan! Thanks so much I actually just replaced my front or rear differential fluid a couple thousand miles ago (I can't remember which one at the moment, front or rear haha-whichever one Mercedes-Benz does not come right out and tell you that you need to change periodically for the W212)
- Andrew
Were your diff oils contaminated with glitters at that point ??
Do you happen to live on mostly flat land (Nederlands) or hills everywhere like California??
This loads the diff differently.
Last edited by CaliBenzDriver; May 2, 2026 at 11:54 PM.
My 2016 E350 has just under 50k miles. When the time comes as I do not drive it much I will be doing transmission fluid change and serpentine belt. I did the spark plugs, coil packs and filter when I bought it.
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