SIMPLIFIES BATTERY REPLACEMENT: Avoid expensive dealer service charges by easily replacing your key fob battery yourself! No need to schedule battery replacement service, no need to reprogram remote control.The included tool helps to open the remote control and remove the batteries without damaging the remote control case.SAFE AND RELIABLE - Tested under Strict Quality Control Standards. Longer battery life and more power to last.ORIGINAL CR2025 BATTERY - This listing is for OEM Original replacement batteries as provided by Mercedes Benz for all 1995-2016 black or chrome-sided (2, 3 or 4 button) smart key remotes.( IYZ-3312 IYZ3312 IYZDC and P/Ns: 5WK47283 20490511049999 20490562029999 ) (Keyless entry remote fob not included.)OEM BATTERIES TESTED TO WORK WITH - A-Class (W176) - (2013-2018) / B-Class (W246) - (2012-2018) / C-Class (W204/S204/W205/S205/C205/A205) - (2012-2018) / E-Class (W212/S212/C207/A207) (2010-2016) / S-Class (W221/W222/C217/A217) - (2010-2017) / G-Class (W463) - (2013-2018) / M-Class (W166) - (2012-2016) / Class (W447) - (2015-2018) / CLA (C117) - (2014-2019) / CLS (W218) - (2012-2018) / GLA (X156) - (2015-2019) / GLC (X253/C253) - (2016-2019) / GLE (W166/C292) - (2016-2019) / GLK (X204) - (2010-2016) / GL/GLS (X166) - (2013-2019) / SL (R231) - (2013-2018) / SLK/SLC (R172) - (2012-2019) / Viano (W639) - (2011-2014) / Metris (W447) - (2016-2018)etc." - Please check product image to confirm compatibility.( Opening/Pry Tool + Installation video included) - "