Updating All Modules Worth it?
02-07-2021, 03:23 AM
#1
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2015 ML400 4MATIC, 2014 E350 4MATIC, 2006 E350
Updating All Modules Worth it?
Hi people of MB World,
My 2014 E350W4M has some slight issues with shifting and cults when steeping on it, and I do get the occasional Bluetooth issue in the car for Bluetooth audio. I have place near me that can update all the modules in the car, and im just having trouble justifying the price ($300 CAD)
Has anyone updated their ECU and TCU on the M276.952? Have you noticed a difference in your case?
My 2014 E350W4M has some slight issues with shifting and cults when steeping on it, and I do get the occasional Bluetooth issue in the car for Bluetooth audio. I have place near me that can update all the modules in the car, and im just having trouble justifying the price ($300 CAD)
Has anyone updated their ECU and TCU on the M276.952? Have you noticed a difference in your case?
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pierrejoliat (02-07-2021)
02-07-2021, 11:11 AM
#4
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Here's my opinion.... sounds like a great way to part with $300. The description of "updating all the modules" is vague enough to be almost useless.
A good shop will first diagnose what's going on before telling you anything. That means looking at module and ECU live data first. Your shift and stumble issue may be related to fuel and/or ignition. Need to look at what the fuel trims are, O2 data, ignition data, injector pulse, a variety of things. I've often seen a misfiring coil or plug get labeled as a transmission shift issue because of the stumble. Even a corroded connector can cause problems.
Example: use scan data to verify TCM (transmission control module) is receiving all data from ECU and various sensors such as throttle position, wheel sensors, etc. There are 7-9 electronic solenoids in the conductor plate that control shift valves in the valve body. Is all this stuff working properly? Verification of operation includes checking circuits, sensor and CANBUS (network) data.
Not all modules have or need updates. Same good shop or dealer will have access to tech bulletins defining software upgrades. Not just tell you "all" modules get updated.
My honest answer is don't be penny wise and dollar foolish. Get a proper diagnosis done on the car. Certainly it's your choice, just would hate to see you come back posting that the shop did all the supposed upgrades and the problem is unchanged.
A good shop will first diagnose what's going on before telling you anything. That means looking at module and ECU live data first. Your shift and stumble issue may be related to fuel and/or ignition. Need to look at what the fuel trims are, O2 data, ignition data, injector pulse, a variety of things. I've often seen a misfiring coil or plug get labeled as a transmission shift issue because of the stumble. Even a corroded connector can cause problems.
Example: use scan data to verify TCM (transmission control module) is receiving all data from ECU and various sensors such as throttle position, wheel sensors, etc. There are 7-9 electronic solenoids in the conductor plate that control shift valves in the valve body. Is all this stuff working properly? Verification of operation includes checking circuits, sensor and CANBUS (network) data.
Not all modules have or need updates. Same good shop or dealer will have access to tech bulletins defining software upgrades. Not just tell you "all" modules get updated.
My honest answer is don't be penny wise and dollar foolish. Get a proper diagnosis done on the car. Certainly it's your choice, just would hate to see you come back posting that the shop did all the supposed upgrades and the problem is unchanged.
