Light sensor and remote issue... OCP help...
Thread Starter
Junior Member
Joined: Mar 2011
Posts: 31
Likes: 4
GL63/GL550/S550/S430
Light sensor and remote issue... OCP help...
Dear friends,
Did anyone experience the following problem with OCP (overhead control panel):
- had no auto temp for long time... dealer said no communication with OCP. I replaced OCP with a used one now heat/ac is perfect. Now get 'Light sensor' message and no remote function. Car has new battery, everything else works good.
- Took to dealer again for diagnostics, they say no communication with OCP. Replace with another OCP module (they are 50 on ebay vs 800 at dealer). Same problem - temp works perfect, but light sensor message and no remote...
Any ideas?
Thank you in advance...
Did anyone experience the following problem with OCP (overhead control panel):
- had no auto temp for long time... dealer said no communication with OCP. I replaced OCP with a used one now heat/ac is perfect. Now get 'Light sensor' message and no remote function. Car has new battery, everything else works good.
- Took to dealer again for diagnostics, they say no communication with OCP. Replace with another OCP module (they are 50 on ebay vs 800 at dealer). Same problem - temp works perfect, but light sensor message and no remote...
Any ideas?
Thank you in advance...
Super Member
Joined: Nov 2010
Posts: 682
Likes: 134
Benz
Dear friends,
Did anyone experience the following problem with OCP (overhead control panel):
- had no auto temp for long time... dealer said no communication with OCP. I replaced OCP with a used one now heat/ac is perfect. Now get 'Light sensor' message and no remote function. Car has new battery, everything else works good.
- Took to dealer again for diagnostics, they say no communication with OCP. Replace with another OCP module (they are 50 on ebay vs 800 at dealer). Same problem - temp works perfect, but light sensor message and no remote...
Any ideas?
Thank you in advance...
Did anyone experience the following problem with OCP (overhead control panel):
- had no auto temp for long time... dealer said no communication with OCP. I replaced OCP with a used one now heat/ac is perfect. Now get 'Light sensor' message and no remote function. Car has new battery, everything else works good.
- Took to dealer again for diagnostics, they say no communication with OCP. Replace with another OCP module (they are 50 on ebay vs 800 at dealer). Same problem - temp works perfect, but light sensor message and no remote...
Any ideas?
Thank you in advance...
Thread Starter
Junior Member
Joined: Mar 2011
Posts: 31
Likes: 4
GL63/GL550/S550/S430
Hi knowbenz,
Thank you for the time you took to reply and point me in that direction. I will check the sensor connection first, since I had windshield replaced some time ago and possibly the non-dealer installers did not connect the sensor correctly... come to think of it, the rain sensor (same assembly as daylight sensor) did not work amazingly good, but since it did not rain in so cal for years, I did not pay attention to it... will update on Sunday, when I get to work on it again...
...would a broken/misconnected rain/light sensor cause OCP malfunction and cause RF remote not work? Will find out soon
Thank you for the time you took to reply and point me in that direction. I will check the sensor connection first, since I had windshield replaced some time ago and possibly the non-dealer installers did not connect the sensor correctly... come to think of it, the rain sensor (same assembly as daylight sensor) did not work amazingly good, but since it did not rain in so cal for years, I did not pay attention to it... will update on Sunday, when I get to work on it again...
...would a broken/misconnected rain/light sensor cause OCP malfunction and cause RF remote not work? Will find out soon
Super Member
Joined: Sep 2012
Posts: 690
Likes: 76
From: Montreal, Quebec
2009 E350 4M Avantgarde;mistress 2002 S600; wife 2014 C300 4M
if you got an "el cheapo" windshield installed, rain sensor etc will not work as per MB design for your car model. the rain sensor is part of the windshield.
Good luck!!
Good luck!!
Thread Starter
Junior Member
Joined: Mar 2011
Posts: 31
Likes: 4
GL63/GL550/S550/S430
Kraut56, it was OEM windshield. Surprisingly dealers don't want to install glass here, so it had to be a contractor.
BTW, another s430 funny thing - had my transmission 'serviced' at 100k by an independent mechanic, 30k later transmission started to occasionally shake the car on the freeway... dealer could not diagnose the issue (mounts (eng and tran), slip disk were done before and were perfect)... decided to see trans fluid... it was black and smelly, apparently wrong type for MB, flushed and replaced the fluid and tranny is like new again... Got to be careful with 'independent master mechanics'
BTW, another s430 funny thing - had my transmission 'serviced' at 100k by an independent mechanic, 30k later transmission started to occasionally shake the car on the freeway... dealer could not diagnose the issue (mounts (eng and tran), slip disk were done before and were perfect)... decided to see trans fluid... it was black and smelly, apparently wrong type for MB, flushed and replaced the fluid and tranny is like new again... Got to be careful with 'independent master mechanics'
Super Member
Joined: Sep 2012
Posts: 690
Likes: 76
From: Montreal, Quebec
2009 E350 4M Avantgarde;mistress 2002 S600; wife 2014 C300 4M
That's why I do almost all the work on my S600 by myself (other than engine oil changes - too much of a hassle to get underneath the car just for that - MB is very reasonable for this task).
Member
Joined: Feb 2018
Posts: 97
Likes: 17
From: Gold Canyon, Az.
1988 560SL, 2017 SL 450, and a few Corvettes
Kraut56, it was OEM windshield. Surprisingly dealers don't want to install glass here, so it had to be a contractor.
BTW, another s430 funny thing - had my transmission 'serviced' at 100k by an independent mechanic, 30k later transmission started to occasionally shake the car on the freeway... dealer could not diagnose the issue (mounts (eng and tran), slip disk were done before and were perfect)... decided to see trans fluid... it was black and smelly, apparently wrong type for MB, flushed and replaced the fluid and tranny is like new again... Got to be careful with 'independent master mechanics'
BTW, another s430 funny thing - had my transmission 'serviced' at 100k by an independent mechanic, 30k later transmission started to occasionally shake the car on the freeway... dealer could not diagnose the issue (mounts (eng and tran), slip disk were done before and were perfect)... decided to see trans fluid... it was black and smelly, apparently wrong type for MB, flushed and replaced the fluid and tranny is like new again... Got to be careful with 'independent master mechanics'
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"Back to the wall goes Berra, it is...over the fence, homerun, the Pirates win!!"
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Senior Member
Joined: Apr 2019
Posts: 428
Likes: 96
From: Houston
001 s600, 94 sl600
Black and smelly trans fluid BAD OMEN
[QUOTE=Arizona Mike;7778618]There are some things most car dealers seems to farm out, mainly glass and body/paint work. Probably cheaper for them.
SOME transmissions are designed to have 'non-lock up' torque converter 'lock-up clutches. If your car specifies a non standard MB only fluid, that may be why. Special 'friction modifier' additive is needed to keep this constant slip clutch working smoothly. Otherwise it gets 'grabby' and no longer smooth. That the incorrect fluid badly overheated (black and smelly) is not good. Be sure and check fluid shortly to confirm it is still clean and not overheating.
__________________________________________________ __________________________
SOME transmissions are designed to have 'non-lock up' torque converter 'lock-up clutches. If your car specifies a non standard MB only fluid, that may be why. Special 'friction modifier' additive is needed to keep this constant slip clutch working smoothly. Otherwise it gets 'grabby' and no longer smooth. That the incorrect fluid badly overheated (black and smelly) is not good. Be sure and check fluid shortly to confirm it is still clean and not overheating.
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