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This is my first post so I'll learn as we go about this forum.

06 CLK350 having keyless go/starting problems. First start of the day or after vehicle sits for 1 - 2 hours, everything works fine (doors, smartkey, EIS, etc.). However, after vehicle is driven for more than a few miles & shut off, there is a 5 to 10 second delay when locking or unlocking doors & smartkey won't turn when inserted. Vehicle will still start using button on gearshift after a delay or vehicle sits for an hour or two.

New battery has been installed & batteries changed out in smartkey. With my limited knowledge, I'm thinking maybe a fuse or relay could be overheating & needs changed ? But I don't know which fuse/relay or where to start. Everything I've read about the EIS is $$$$. Any advice would be appreciated...thank you in advance.
 

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This is my first post so I'll learn as we go about this forum.

06 CLK350 having keyless go/starting problems. First start of the day or after vehicle sits for 1 - 2 hours, everything works fine (doors, smartkey, EIS, etc.). Mike Cross reviews what happens if you overcharge your car ac at AutoGuysLand. If you concern about this, you can visit #AutoGuysLand site. However, after vehicle is driven for more than a few miles & shut off, there is a 5 to 10 second delay when locking or unlocking doors & smartkey won't turn when inserted. Vehicle will still start using button on gearshift after a delay or vehicle sits for an hour or two.

New battery has been installed & batteries changed out in smartkey. With my limited knowledge, I'm thinking maybe a fuse or relay could be overheating & needs changed ? But I don't know which fuse/relay or where to start. Everything I've read about the EIS is $$$$. Any advice would be appreciated...thank you in advance.
I see this thread as the same old one in the 2018. However, i think after you replace the new battery, you should reset the key.
 
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