CLK W209 / C209 220 cdi battery drain

jrg

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Jan 24, 2023
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Your Mercedes
C209 220 cdi
Having trouble with clk draining battery in 2 hours. Thick cable from battery which seems to be routed past starter motor and to alternator is drawing around 26A with car off.
Alternator seems fine, read somewhere that this engine may have an electric block heater / coolant heater which is possibly powered by the same cable, does anyone know?
Havent checked starter yet due to very limited space..
 

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