Please help
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Newbie
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.
Junior Member
Joined: Jan 2004
Posts: 24
Likes: 3
From: California
1983 300TD, 1998 SL500 (sold), 2013 GL450
Yikes. First, this is the x166 forum so you might try on your model specific forum.
but, x166 also have the m278 motor. At first glance looks like several unrelated sensors have short to ground. I’d suspect you’re on the right track with the harness and oil contamination. How to the camshaft position sensors look? You may need to clean several times over a few weeks. I had talked to an Indy this past year about similar issues on an m276, his regimen was to remove the harness at the ECU and spray with electrical cleaner liberally and soak up as much oil as he could, reassemble and send the customer on his way for a week or two, and bring him back to repeat. Do this like 3-4 times- he seemed to think most of the time this would be adequate.
but, x166 also have the m278 motor. At first glance looks like several unrelated sensors have short to ground. I’d suspect you’re on the right track with the harness and oil contamination. How to the camshaft position sensors look? You may need to clean several times over a few weeks. I had talked to an Indy this past year about similar issues on an m276, his regimen was to remove the harness at the ECU and spray with electrical cleaner liberally and soak up as much oil as he could, reassemble and send the customer on his way for a week or two, and bring him back to repeat. Do this like 3-4 times- he seemed to think most of the time this would be adequate.
