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Vogon constructor fleet.
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Discussion Starter · #1 · (Edited)
Just a "heads up" about replacing the voltage regulator on an '00 CL500. Contrary to all the posts I've read, you DON'T have to do the replacement on a bench BUT you will have to remove the alternator from the mount. I neglected to take pics but here's how I did it:

1) Disconnect negative battery terminal
2) Remove serpentine belt
3) Relocate coolant reservoir...just one 10mm bolt holds it....just move the reservoir out of the way. Don't disconnect hoses.
4) Remove alternator mounting bolts
5) Once freed, just lay the alt "pulley side down" in the space beneath it. You'll see what I mean.
6) Remove the 3 electrical leads connected to the back and the back cover. It's held on by 2 Phillips head screws. Easy.
7) Remove the regulator. Again, 2 screws.
8) While you're at it, you may want to take some steel wool and clean the contacts on the alt.
9) Install the new regulator, replace the cover and electrical leads, reposition the alternator on the mounts, put the screws back, put the coolant reservoir back, reconnect the battery and reinstall the serpentine belt.

YOU'RE DONE! It took me all of an hour or so.

Also, a side note. On early production cars, you may find you have the "old style" voltage regulator (Bosch #1197311211), not the newer one. Verify which one you have before ordering one. I have the old style one so these instructions apply to that model regulator. I've attached a pic of the two.

Good luck!!

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