Car switch the power while driving and not only
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Joined: Jul 2017
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mercedes w209 clk 320 CDI 2006 year
Car switch the power while driving and not only
First of all i would like to welcome everyone on this forum. I'm a happy owner of this beautiful car but only sometimes the car reacts like woman.... 
My question to technics is:
When i start the engine after turning the key to 1 or second position CLK shut the power out. ALSO what more problematic CLK shut the engine while driving. I read some issues with 40K relay but this is old model. I dont know what to do. Even local Mercedes workshop cannot find the issue. Anyone had similiar issue ? Please help. Mariusz
My question to technics is:
When i start the engine after turning the key to 1 or second position CLK shut the power out. ALSO what more problematic CLK shut the engine while driving. I read some issues with 40K relay but this is old model. I dont know what to do. Even local Mercedes workshop cannot find the issue. Anyone had similiar issue ? Please help. Mariusz
MBworld Guru
Joined: Dec 2009
Posts: 10,782
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NO LONGER ACTIVE
This could be a bad EIS (electronic ignition switch), or a bad CPS (crankshaft position sensor). A bad CPS will prevent the car from starting (the starter will rotate the engine, but nor "fire") and will cut off intermittently when driving, typically when the ambient temperature and engine temperature is hot. A proper tech should be able to diagnose either problem.
Last edited by Rudeney; Jul 2, 2017 at 01:44 PM.
