My 2007 Mercedes-Benz cls550 does not crank when engine is hot
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2007 Mercedes-Benz CLS 550
My 2007 Mercedes-Benz cls550 does not crank when engine is hot
2007 Mercedes-Benz CLS550 does not crank when engine is hot. In morning going to work and in evening coming from work, the car starts OK. I replace battery and the problem is the same.
I can test battery from the Starter relay. I can measure voltage at the input of the Starter relay.
What is a problem?
Johnny
(W219) engine
I can test battery from the Starter relay. I can measure voltage at the input of the Starter relay.
What is a problem?
Johnny
(W219) engine
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Thread Starter
Junior Member
Joined: Jun 2018
Posts: 23
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2007 Mercedes-Benz CLS 550
The starter is controlled by 3 relays:
1. Engine circuit relay
2. Starter relay
3. Circuit relay
The engine circuit and starter relays are controlled or turned on by 2 signals from the ME control module.
The circuit relay is controlled by the ignition key. These 3 relays reside in the Driver Side SAM control module.
I will check them on this weekend.
Johnny
1. Engine circuit relay
2. Starter relay
3. Circuit relay
The engine circuit and starter relays are controlled or turned on by 2 signals from the ME control module.
The circuit relay is controlled by the ignition key. These 3 relays reside in the Driver Side SAM control module.
I will check them on this weekend.
Johnny
Senior Member
Joined: Oct 2014
Posts: 254
Likes: 34
From: Oregon
2006 ML350, 2005 C55, 2004 E55
The starter is controlled by 3 relays:
1. Engine circuit relay
2. Starter relay
3. Circuit relay
The engine circuit and starter relays are controlled or turned on by 2 signals from the ME control module.
The circuit relay is controlled by the ignition key. These 3 relays reside in the Driver Side SAM control module.
I will check them on this weekend.
Johnny
1. Engine circuit relay
2. Starter relay
3. Circuit relay
The engine circuit and starter relays are controlled or turned on by 2 signals from the ME control module.
The circuit relay is controlled by the ignition key. These 3 relays reside in the Driver Side SAM control module.
I will check them on this weekend.
Johnny
MBWorld Fanatic!
Joined: May 2015
Posts: 4,037
Likes: 1,012
From: Miami, FL
2003 CL 600
There is a connector on the top of the engine that has the trigger wire for the starter solenoid. It's a 2.5mm purple/white wire. If you jump power to it, the starter will spin. This is how you quickly rule out a starter without chasing a bunch of relays or taking anything apart. I'll try to post up a pic of it but Star Wiring has been funny lately, I don't know if they got it fixed.
Thread Starter
Junior Member
Joined: Jun 2018
Posts: 23
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2007 Mercedes-Benz CLS 550
My car has a starter problem. The 12V on the starter solenoid used to start engine cranking (turn ignition key to Start) is shorted to ground when engine is hot.
I find out from the Starter relay. The Starter relay has input voltage of 12V (Pin 3) and 12V (Pin 1 and 2) to close connection but its output (Pin 5) is 0V. The output should be 12V. The output is connected to the starter solenoid. I measure resistance to be 0.2 Ohm between the output and ground when engine is hot.
I find out from the Starter relay. The Starter relay has input voltage of 12V (Pin 3) and 12V (Pin 1 and 2) to close connection but its output (Pin 5) is 0V. The output should be 12V. The output is connected to the starter solenoid. I measure resistance to be 0.2 Ohm between the output and ground when engine is hot.
