Small Engine Compartment when not running
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Joined: Aug 2024
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2016 E350
Small Engine Compartment when not running
Has anyone experienced this problem? I have a 2016 E350 Sport (Flex Fuel) with 71K miles and on several occasions, while approaching the car after an hour or more of turning it off there's a small engine compartment explosion with smoke coming from underneath the hood (before I start the car). Recent repairs include replacement of ignition coils, replacement of intake manifold and gaskets, replacement of spark plugs, replacement of 1 fuel injector, oil separator, centrifuge cover, and camshaft. But no one seems to know the cause of this problem.
Out Of Control!!
Joined: Apr 2019
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
mysterious explosion with smoke...
Has anyone experienced this problem? I have a 2016 E350 Sport (Flex Fuel) with 71K miles and on several occasions, while approaching the car after an hour or more of turning it off there's a small engine compartment explosion with smoke coming from underneath the hood (before I start the car).
Recent repairs include replacement of.... :
But no one seems to know the cause of this problem.
Recent repairs include replacement of.... :
- ignition coils,
- intake manifold and gaskets,
- spark plugs,
- 1 fuel injector,
- oil separator,
- centrifuge cover,
- camshaft.
But no one seems to know the cause of this problem.
This sounds like it could be heat stress sounds while engine is cooling down.... the smoke may be release of coolant vapor.
Pls use your camera take picture of your concern ✌️
Last edited by CaliBenzDriver; Aug 6, 2024 at 08:06 PM.
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S212 E300
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Newbie
Joined: Aug 2024
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2016 E350
Real good maintenance items list. Consider a serpentine belt kit within 10kMi or replace old idler bearing directly above A/C compressor soon.
This sounds like it could be heat stress sounds while engine is cooling down.... the smoke may be release of coolant vapor.
Pls use your camera take picture of your concern ✌️
This sounds like it could be heat stress sounds while engine is cooling down.... the smoke may be release of coolant vapor.
Pls use your camera take picture of your concern ✌️
Super Member
Joined: Feb 2019
Posts: 681
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From: FL
2012 E550 sedan 2019 E63 Wagon
Sound like a fuel pump priming, if you are walking around the car with your keys W212 (and newer cars) like doing that. Most people don't like to wait to crank a car, so pump preps just in case. Could be a faulty one?
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