MFCU pin locatons for vario roof analysis? - Mercedes Benz SLK Forum

SLK R170 General Discussion SLK 200, SLK 230K, SLK 320, SLK32 AMG

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#1 Old 05-05-2019
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MFCU pin locatons for vario roof analysis?

Look at this pic and please let me know what box is the mfcu and where are the pins and the pin numbers for the vario roof. I have a 2003 slk 230.
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#2 Old 05-05-2019
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Couple of threads here that may contain the information.

Always worth a search.

https://www.slkworld.com/gtsearch.php...20vario%20roof

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#3 Old 05-05-2019
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Be careful when grounding the pins on the MFCU. Triple check the wire colors and numbers as they are very close together and its easy to get the wrong one.
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File Type: pdf Removing and installing multifunction control module.pdf (210.8 KB, 12 views)
File Type: pdf MFCU Roof Switch Pinout 1998.pdf (24.4 KB, 11 views)
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#4 Old 05-05-2019
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It's on the bottom of the picture - with the gray connector on the right side.

If you cut the zip ties that secure the wires to the shell (on the opposite end from the gray) and use a good flashlight you can actually see the pin numbers. The roof wires are among the smallest wires.
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#5 Old 05-05-2019
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I bought a Logic Probe (fancy probe / test light) for $7.50 at Harbor Freight. The most expensive one they had, believe it or not. Very helpful in determining if there was a ground on a pin. Has internal protection so you won't blow out the delicate circuits in your MFCU.
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#6 Old 05-06-2019
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I should've added - the pinout is shown from above in post 14 in this thread: https://www.slkworld.com/slk-r170-ge...ere-start.html
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#7 Old 05-07-2019
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In addition to all of the above info, Top Hydraulics has an excellent video on Youtube regarding Vario Roof switch locations and diagnosing at the MFCU.

Here is the link -

and/or keywords on Youtube: Mercedes R170 SLK Top Troubleshooting - Explanation of Electrical system and Microswitch Locations
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