CLK 55 AMG 2004
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Joined: May 2023
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mercedes clk 55 amg
CLK 55 AMG 2004
Hello, new to the group.
I have just bought a clk55 2004 and noticed right away that the temps started rising the second i stop the car and let it idle. So i opened the hood and saw that the radiator fan does not operate.
Now i have done som research on the topic and tried replacing the motor/ control unit for the fan and when i plugged it in and tried starting, everything worked perfectly, but now it only works sometimes and only on the lowest speed so the car still over heats (note: the replacement was a used one from ebay with a hole in the cover on the control unit)
I have meassured the power in to the control unit and it meassures 12v, on the main power wire, 12v on one of the small signal wires and around 1,5-2v on the second small wire (this depends on the engine temp.
does anyone have any suggestions as to what the issiue might be? Maybe the signal voltage from the ecu is too low? If so does anyone know what the right readings are?
i have ordered a brand new motor and control unit, just wanted to check and se if there is something i am not thinking about checking
(Every fuse is working)
sorry for the bad english👍🏼
I have just bought a clk55 2004 and noticed right away that the temps started rising the second i stop the car and let it idle. So i opened the hood and saw that the radiator fan does not operate.
Now i have done som research on the topic and tried replacing the motor/ control unit for the fan and when i plugged it in and tried starting, everything worked perfectly, but now it only works sometimes and only on the lowest speed so the car still over heats (note: the replacement was a used one from ebay with a hole in the cover on the control unit)
I have meassured the power in to the control unit and it meassures 12v, on the main power wire, 12v on one of the small signal wires and around 1,5-2v on the second small wire (this depends on the engine temp.
does anyone have any suggestions as to what the issiue might be? Maybe the signal voltage from the ecu is too low? If so does anyone know what the right readings are?
i have ordered a brand new motor and control unit, just wanted to check and se if there is something i am not thinking about checking
(Every fuse is working)
sorry for the bad english👍🏼
Super Member
Joined: Jul 2010
Posts: 611
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From: USA
2005 Mercedes Benz C55 AMG..1967 Lotus Europa..1987 Lotus Turbo Esprit HCI..2020 Mercedes Benz E350
Nikolai12345....
Check for continuity & volts of the Hella relay which is located in the SAM (against the firewall in the engine bay).
Report back to this forum with your results.
Good luck.....
Rob
Check for continuity & volts of the Hella relay which is located in the SAM (against the firewall in the engine bay).
Report back to this forum with your results.
Good luck.....
Rob
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mercedes clk 55 amg
okay thank you! will check and report back when I get home in a couple of days
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mercedes clk 55 amg
Now i have done some searching and cannot seem to find a relay? Doubble Checked the 125amp fuse next to the battery and the 7,5 amp in the driver side fuse box. Went out and bought a new temp sensor just in case, this did not fix anything either. So i guess i will just have to wait for the new unit to arive from Germany.
Super Member
Joined: Jul 2010
Posts: 611
Likes: 197
From: USA
2005 Mercedes Benz C55 AMG..1967 Lotus Europa..1987 Lotus Turbo Esprit HCI..2020 Mercedes Benz E350
Nikolai12345.....
Here's a pdf attachment which shows the fuses and relays (including the legend as to what they're for) of the front SAM for the w203 chassis. This is what you need to find for your CLK w209 chassis as I'm sure they're slightly different.
Good luck and keep the forum posted....
Rob
Here's a pdf attachment which shows the fuses and relays (including the legend as to what they're for) of the front SAM for the w203 chassis. This is what you need to find for your CLK w209 chassis as I'm sure they're slightly different.
Good luck and keep the forum posted....
Rob
Super Member
Joined: Jul 2010
Posts: 611
Likes: 197
From: USA
2005 Mercedes Benz C55 AMG..1967 Lotus Europa..1987 Lotus Turbo Esprit HCI..2020 Mercedes Benz E350
Nikolai12345.....
Here's another url link for what you may need: https://imgvehicle.com/mercedes-benz...-w209/fuse-box
Again.....good luck........
Rob
Here's another url link for what you may need: https://imgvehicle.com/mercedes-benz...-w209/fuse-box
Again.....good luck........
Rob
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Joined: May 2023
Posts: 4
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mercedes clk 55 amg
Now i have mounted the new unit and it works, but only when i turn the ac on and then it proceeds to go full speed. Can this indicate a bad temp sensor? Is it only the sensor on the waterpump or is there more engine tempsensors?
