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2005 CLK500 some of issues. Please advise!

639 Views 5 Replies 3 Participants Last post by  Benzyle
Hi, I just bought 2005 CLK500 convertible.(W113 engine) I have 2 issues cuurently that I need your help & advise. The first issue, engine won't crank at first attemp but 2nd or 3rd attempt it runs without any issues. I am suspecting crankshaft sensor because, battery and spark plugs has changed a year ago. What can be cause of that issue? Btw, there is NO engine light and code on the dash.

The 2nd issue, when I started it, there is clicking noise coming from command unit or A/C control unit area. It nocking at least 1 minute or so and when I shut off the engine also that sounds come again.

Thanks in advance for your comments.
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Not firing until the second or third try could be a fuel supply issue. Check fuel pressure at the rail via the schraeder valve.
Possible clogged fuel filter ,bad fuel pump and or clogged /bad fuel injectors.

Clicking noise is due to a broken stepper motor linkage in the heater/ac ventilation system.
As a way to prevent it , try running the system with the activated charcoal filter selected at all times.
As Tony says , the way to fix it properly is to replace the broken parts .
Unfortunately ,,No.
You need to remove the ash tray , shifter trim , a/c switch panel , stereo unit and upper switch panel and possibly more , depending on exactly which motor it is and where it is located.
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