This is a repair service for all Mercedes Benz electronic ignition units, also known as EIS/EZS unit. You will need to remove and send us your ignition unit and we will diagnose and repair any fault you may have with it. We will need you to also send all keys you have for the vehicle with the unit. No need to replace your EIS at a great cost, we can save you money. One of the most common faults is that the EIS no longer recognizes the key, this prevents you from turning the key and starting the engine. Please watch our video which explains to you how to remove the EIS unit from your car. All Mercedes Benz models covered. Mercedes A-Class (W169) 2004-2010 Mercedes B-Class (W245) 2005-2010 Mercedes C-Class (W203) 2003-2007 Mercedes C-Class (W204) 2007-2009 Mercedes CL-Class (W215) 2001-2006 Mercedes CL-Class (W216) 2005-2009 Mercedes CLK-Class (W208) 2001-2002 Mercedes CLK-Class (W209) 2003-2008 Mercedes CLS-Class (W219) 2004-2009 Mercedes E-Class (W210) 2001-2002 Mercedes E-Class (W211) 2002-2007 Mercedes E-Class (W212) 2009-2010 Mercedes G-Class (W463) 2002-2009 Mercedes GL-Class (X164) 2006-2009 Mercedes M-Class (W164) 2005-2009 Mercedes R-Class (W251) 2005-2009 Mercedes S-Class (W220) 2001-2005 Mercedes S-Class (W221) 2005-2009 Mercedes SL-Class (R230) 2001-2009 Mercedes SLK-Class (R171) 2004-2009 Mercedes Sprinter (W906) 2005-2009 Mercedes Viano (W639) 2004-2009 Mercedes Vito (W639) 2004-2009