Please help
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Joined: Jan 2026
Posts: 12
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Please help
Hey guys can someone help me i have 2011 cl500 4,7 l biturbo facelift model
i have trouble sometimes when its cold car goes into second ingition but wont crank no start. Eventually with a key not with start stop button after few tries it will start and check engine light comes on and when it get to temperature drives and start perfectly. Not every day is doing only. sometimes
when i plug to obd its giving all sorts of codes short circuits to ground
P209400 The actuator "Exhaust camshaft" (cylinder bank 2) has a short circuit STORED to ground._
P209000 Actuator "Exhaust camshaft" (cylinder bank 1) has a short circuit to ground._
STORED
P059800 The coolant thermostat has a short circuit to ground._
STORED
P209200 The actuator "Intake camshaft" (cylinder bank 2) has a short circuit to STORED ground._
P208800 Actuator "Intake camshaft" (cylinder bank 1) has a short circuit to ground._
STORED
P005100 The output for the heater of oxygen sensor 1 (cylinder bank 2) has a short circuit to ground._.
STORED
P003100 The output for the heater of oxygen sensor 1 (cylinder bank 1) has a short circuit to ground..
STORED
P024511 The output for the low-pressure turbocharger has a short circuit to ground. There is a short circuit to ground.
STORED
P045800 The purge valve of the evaporative emission control system has a short circuit to ground._
STORED
P25051C The power supply at the input of the control unit
"combustion engine" has an electrical fault. The voltage value is outside the permissible range.
i changed both bateries main and aux.
i changed all 4 camshaft positions sensors
clean the wiring and ecu on the pin was little oil
becouse of migration of oil from the camshaft sensors.
i have trouble sometimes when its cold car goes into second ingition but wont crank no start. Eventually with a key not with start stop button after few tries it will start and check engine light comes on and when it get to temperature drives and start perfectly. Not every day is doing only. sometimes
when i plug to obd its giving all sorts of codes short circuits to ground
P209400 The actuator "Exhaust camshaft" (cylinder bank 2) has a short circuit STORED to ground._
P209000 Actuator "Exhaust camshaft" (cylinder bank 1) has a short circuit to ground._
STORED
P059800 The coolant thermostat has a short circuit to ground._
STORED
P209200 The actuator "Intake camshaft" (cylinder bank 2) has a short circuit to STORED ground._
P208800 Actuator "Intake camshaft" (cylinder bank 1) has a short circuit to ground._
STORED
P005100 The output for the heater of oxygen sensor 1 (cylinder bank 2) has a short circuit to ground._.
STORED
P003100 The output for the heater of oxygen sensor 1 (cylinder bank 1) has a short circuit to ground..
STORED
P024511 The output for the low-pressure turbocharger has a short circuit to ground. There is a short circuit to ground.
STORED
P045800 The purge valve of the evaporative emission control system has a short circuit to ground._
STORED
P25051C The power supply at the input of the control unit
"combustion engine" has an electrical fault. The voltage value is outside the permissible range.
i changed both bateries main and aux.
i changed all 4 camshaft positions sensors
clean the wiring and ecu on the pin was little oil
becouse of migration of oil from the camshaft sensors.
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Joined: Aug 2014
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S500
clarity no crank or no start ?
with the car key off - disconnect the two main plugs into the engine ECU (the clips slide sideways)... - if damp / wet from dirty gunk the issue maybe oil contamination into the engine ECU damaging it - quite normal with junk bosch parts - almost as if they engineered in the wicking action and made sensors that weep to make use of the feature....
if that is the cause a new loom or lots of contact cleaner and trying to remove it before causing harm to the repaired of replaced ECU will be requied
with the car key off - disconnect the two main plugs into the engine ECU (the clips slide sideways)... - if damp / wet from dirty gunk the issue maybe oil contamination into the engine ECU damaging it - quite normal with junk bosch parts - almost as if they engineered in the wicking action and made sensors that weep to make use of the feature....
if that is the cause a new loom or lots of contact cleaner and trying to remove it before causing harm to the repaired of replaced ECU will be requied
Thread Starter
Newbie
Joined: Jan 2026
Posts: 12
Likes: 0
Yes i already clean it the oil from
clarity no crank or no start ?
with the car key off - disconnect the two main plugs into the engine ECU (the clips slide sideways)... - if damp / wet from dirty gunk the issue maybe oil contamination into the engine ECU damaging it - quite normal with junk bosch parts - almost as if they engineered in the wicking action and made sensors that weep to make use of the feature....
if that is the cause a new loom or lots of contact cleaner and trying to remove it before causing harm to the repaired of replaced ECU will be requied
with the car key off - disconnect the two main plugs into the engine ECU (the clips slide sideways)... - if damp / wet from dirty gunk the issue maybe oil contamination into the engine ECU damaging it - quite normal with junk bosch parts - almost as if they engineered in the wicking action and made sensors that weep to make use of the feature....
if that is the cause a new loom or lots of contact cleaner and trying to remove it before causing harm to the repaired of replaced ECU will be requied
yes i already clean the oil from
the pins that goes into the ecu. It drive fine for two weeks today again no start no crank. After few try it started have a bunch of codes Then i deleted it the codes drived normally and washed the car and again no start no crank and same codes again.
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,123
Likes: 1,288
From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
If it is just the oil leak thru the cam sensors to the wiring the problem would be "no start" as this leaking oil in wires should not prevent it from cranking.
I had a problem once where in cold weather the car would not start on the first try but it did crank and then start on the second try with the CEL on. Found oil in 3 of the 4 cam sensors harness's. Replaced all sensors and all cam magnets too.and installed the protective "pig tails" to all of it.
This "no crank" to me sound like an issue with the starter with the built-in starter solenoid.
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2006 W221 S500L M273
There is a lot of "short circuit to ground" in the DTCs so i'd expect an electrical fault.
But since it's intermittent, it's going to be very hard to find.
@dadavid1 next time when it does not start or runs poorly, try to look at live data with your scan tool (like Xentry) to see what the cam sensors and cam actuators are doing.
Then disconnect them one by one and see if anything changes in the liva data.
But since it's intermittent, it's going to be very hard to find.
@dadavid1 next time when it does not start or runs poorly, try to look at live data with your scan tool (like Xentry) to see what the cam sensors and cam actuators are doing.
Then disconnect them one by one and see if anything changes in the liva data.
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