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Dealership says the adaptive cruise control and regular cruise control isn't working on my GTS due to an potential issue with the battery on the car??? And of course want $2k to "fix" it. Any thoughts around this?
With the car running and producing the recommended volts, if the ACC isn’t working it’s not because of the battery having a bad cell or low voltage would be my guess.
With the car running and producing the recommended volts, if the ACC isn’t working it’s not because of the battery having a bad cell or low voltage would be my guess.
One would think...anyone out there know where to get the details on how the cruise control works and what are some things to troubleshoot?
I'm going to speculate here. I do not know for certain, but based on some recent experiences I've had with my wife's F-Pace, where "some things" stopped working BC the battery management module isolated them and switched them off BC the battery would no longer fully charge....
So, now to cruise control. This system is first switched on when the driver wants to use it. That energizes the cruise control module. As you come to a stop, and if you don't actively switch off the CC by pushing the stalk forward, the module would stay energized when the "engine off" feature is active on stops in comfort mode. It could be that the battery management module has isolated that feature when it determines there is too much load on the battery at a stop (stoplight), then needing enough to restart the car.
So, although "creative" on my part, I wouldn't be shocked if it were something on those lines.
In the case of my wife's F-Pace, which was still under warranty, they replaced the battery so everything functioned again, and I was unaware until I saw it on the service order.....so, maybe.....
Last edited by Acta_Non_Verba; 08-13-2021 at 01:41 PM.
It's possible - you should be able to change the battery yourself for much less and see if that resolves it. On my E63, the eco stop-start wasnt working in Comfort mode, and after noticing the car took longer to start I had the battery checked and was told it was bad. I replaced it and while driving the car in Comfort mode for it to warm up, the auto stop-start began working the first time I stopped. Granted it wasnt a big deal since id never use the feature anyway and only drive in Comfort until the oil is at operating temp, but an example of a feature not working due to a bad battery.
With a GTS, you probably have a Lithium battery and the BEM needs to be reset with the new battery data. Resetting it is distantly similar to resetting the oil change interval. The battery module is using actual voltage measurements along with a time element too. It's an algorithm I don't completely understand (not curious enough to pursue it personally). I can reset mine with one of my generic devices, but I'm sure the dealer is billing some serious coin to do it as part of the replacement cost.
Dealership says the adaptive cruise control and regular cruise control isn't working on my GTS due to an potential issue with the battery on the car??? And of course want $2k to "fix" it. Any thoughts around this?
I fixed mine by removing the (turning it cck) the front grill MB star together with the backing it sits on. This will give you access to the sending/receiving unit. I found that mine was somewhat dislodged from its mounting pins/studs this caused a wrong alignment of the forward signal which in my case was the problem. By just pushing it back on so it was properly and firmly seated on the mounts the issue was resolved.
In my case the front bumper cover had been off at the dealer (to work on different issues) and perhaps the tech did not push hard enough to have the unit properly seated on the its mounts.
I fixed mine by removing the (turning it cck) the front grill MB star together with the backing it sits on. This will give you access to the sending/receiving unit. I found that mine was somewhat dislodged from its mounting pins/studs this caused a wrong alignment of the forward signal which in my case was the problem. By just pushing it back on so it was properly and firmly seated on the mounts the issue was resolved.
In my case the front bumper cover had been off at the dealer (to work on different issues) and perhaps the tech did not push hard enough to have the unit properly seated on the its mounts.
Yup, tried that...as well as latex gloves...the thing barely moves...
The slight turn CCW is more of a click than just a turn. Dirt/dust gets in during rains and can act to tighten the parts.
Stenzel suggested pushing in while trying the turn which is good advice. There are plastic "ramps" molded into the parts that kinda lock when turning to install, so you have to overcome that.
The slight turn CCW is more of a click than just a turn. Dirt/dust gets in during rains and can act to tighten the parts.
Stenzel suggested pushing in while trying the turn which is good advice. There are plastic "ramps" molded into the parts that kinda lock when turning to install, so you have to overcome that.
Yes, tried that...it is pretty snug...I don't want to break it by pushing to hard.
08-13-2021, 10:08 AM
