Kamdog. If I am away from home for more than a week, but the BMW is there, I put it on a trickle charger. Just make sure you get a smart charger, and one that works with your battery. If you have an AGM battery, make sure your smart charger is compatible. Retired - 535i, Monaco, Cream, Light Poplar, ED. The 2011 BMW 5 Series sedan is offered with three available engines that correspond to three trim levels: 528i, 535i and 550i. The 535i and 550i are also offered as "xDrive" all-wheel-drive variants. Location:: FrontLength: 18inFrame Material: SteelBlade Material: Synthetic RubberFrame Color: Black 2015 BMW 535i GT Battery; 2015 BMW 535i GT Spark Plug; Replacement cos was under $100. The IVM is located under the Cabin Filter box. To remove the cabin filter, Lift the tab on this piece and slide to the drivers side. Once the cabin filter has been removed, you will see the Electronics Box. Remove the cover and you can get to the IVM. A BMW airbag restraint system malfunction refers to a problem with one or more components of the airbag system in a BMW vehicle. This can include issues with the airbag sensors, the deployment mechanisms, or the airbags themselves. A warning light will typically illuminate the dashboard if a malfunction is detected, and a diagnostic trouble w1nHAC.