Sunroof not working? My fix and procedure.
Thread Starter
Member
Joined: May 2020
Posts: 247
Likes: 57
From: Fort Worth
2005 CL55 AMG || 2005 CL65 AMG || 1989 560SEC
Sunroof not working? My fix and procedure.
So,
The sunroof on my CL65 was very intermittent, then quit functioning. Error codes referenced sensors in the sunroof motor (limit switch open circuit or short I believe).
Began troubleshooting, no clicks from the sunroof relays while attempting to operate via switch.
I disconnected the sunroof motor, and lo and behold, the relay clicked as it normally should when pressing sunroof buttons. Plug motor back in, nothing. Next attempt- pressed sunroof button to engage relay, then plugged in motor while holding sunroof switch. SUNROOF MOVES! A tiny bit anyways. Bought another motor off ebay (cheap). Same error, no change.
Next stop, grabbing a used overhead control unit (houses the relay, map light buttons, etc. PROBLEM SOLVED! 85% anyways. I can use the sunroof, but it will not function automatically even after learning procedure. whatever, might be a slightly different PCB. IDK, IDC. Good enough for me.
So, try an Ebay used overhead control unit if your sunroof exhibits the same symptoms as mine. $40 fix.
The sunroof on my CL65 was very intermittent, then quit functioning. Error codes referenced sensors in the sunroof motor (limit switch open circuit or short I believe).
Began troubleshooting, no clicks from the sunroof relays while attempting to operate via switch.
I disconnected the sunroof motor, and lo and behold, the relay clicked as it normally should when pressing sunroof buttons. Plug motor back in, nothing. Next attempt- pressed sunroof button to engage relay, then plugged in motor while holding sunroof switch. SUNROOF MOVES! A tiny bit anyways. Bought another motor off ebay (cheap). Same error, no change.
Next stop, grabbing a used overhead control unit (houses the relay, map light buttons, etc. PROBLEM SOLVED! 85% anyways. I can use the sunroof, but it will not function automatically even after learning procedure. whatever, might be a slightly different PCB. IDK, IDC. Good enough for me.
So, try an Ebay used overhead control unit if your sunroof exhibits the same symptoms as mine. $40 fix.
