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CLK 320 Windows, Seat Adjustments, x30/7 CAN connection issue
Hey, I just picked up a 1999 Mercedes-Benz CLK 320—overall, it’s in great shape for its age and I’m pretty happy with the buy. The only real issues are that none of the windows (front or rear) work, the soft top is inoperative, and the seat and mirror adjustment switches are dead. Mechanically, the car is solid, so it’s just these electrical gremlins. I took it to a Mercedes specialist for a diagnostic, which cost me $267 for an hour. The shop told me the x30/7 CAN (bus) connector isn’t operating, which is apparently why all these systems are down. When I got home, I decided to dig in myself. I pulled up the covers/mats on the passenger side and found water pooled underneath. On closer inspection of the CAN connector, I discovered a few wires were fried—definitely not what you want to see. Has anyone dealt with this before? I’m guessing water intrusion is the root cause, but I’m not sure if it’s coming from a clogged sunroof drain, windshield seal, or something else. I’d appreciate advice on:
The best way to track down and fix the water leak.
Whether repairing/replacing the fried wires at the CAN connector is a DIY job or if I should just bite the bullet and have a shop do it.
Any tips for drying out the car and preventing future water issues.
If there’s a good way to test the rest of the CAN system for further damage before I start replacing parts.
I’ve read that electrical issues and water leaks aren’t uncommon on these CLK models, especially as they age
9. If you’ve dealt with similar problems—especially with the CAN bus or water under the carpets—please let me know what worked for you. Thanks in advance!
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