E-Class (W212) 2010 - 2016: E 350, E 550
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Old Feb 3, 2026 | 05:26 PM
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mike18473's Avatar
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E350 2014 4matic
Exclamation EIS Problem

Hey so I got a issue with my EIS, and its kept on getting worse. Basically it started around a year ago where my keyless go stopped working, I didn't think much and just inserted the key. However, a few months go by and on a cold winter morning it wouldn't turn on. I searched around and I figured maybe it was cold so I blew hot air at it and it worked right away. fast forward almost a year and it takes a heat gun and like 20 minutes to start it. I am looking to get it replaced, is anyone able to either replace it or refer me to anyone that would be able to. I heard because its FBS4 its not that easy.
W212 E350 4matic 2014

This is vin WDDHF8JB0EA869155
letters on part is is A 218 905 35 01
FBS 4
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Old Feb 3, 2026 | 06:43 PM
  #2  
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W212 MY'14 M276-3.5NA @75kMi
Originally Posted by mike18473
Hey so I got a issue with my EIS, and its kept on getting worse. Basically it started around a year ago where my keyless go stopped working, I didn't think much and just inserted the key. However, a few months go by and on a cold winter morning it wouldn't turn on. I searched around and I figured maybe it was cold so I blew hot air at it and it worked right away. fast forward almost a year and it takes a heat gun and like 20 minutes to start it. I am looking to get it replaced, is anyone able to either replace it or refer me to anyone that would be able to. I heard because its FBS4 its not that easy.
W212 E350 4matic 2014

This is vin WDDHF8JB0EA869155
letters on part is is A 218 905 35 01
FBS 4
He who does that well is a MB Dealer.

This is a security part few professionals have access to.

Call around, let them know it is the "EIS - key slot" not the usual "ESL - steering lock".
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