The 2015 mercedes cla 250 auxiliary battery location is under the floor board, and You will need to pull up the carpet. Getting a replacement of thiS-TYPE will cost You about 110 to 140 dollars from moSTStores. To put a new battery in You will first need to remove the old battery. To do this first remove the negative and positive cables. This will allow You to get to the bolts that hold the battery in place. Remove those as well and then You will be able to pull it up. The battery is quite heavy, so make sure You pull straight up and then move it out. Now put the new one down and bolt it back in, then connect the battery cables and You will be done.
Jamal W
November 18, 2020
Beneath the carpet and floorboard of the front passenger side.
Auxiliary battery location, not primary battery, there are 2 batteries,
Mina T
July 16, 2020
A battery is located under the hood of the 2015 mercedes cla 250, look for the large black box that has a red and black connector on the top.
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