I did a search on this and didn't turn up very much, just one thread that discussed epoxy and check balls and didn't sound like the same issue anyway.
Now that the weather has taken a sudden chill, the GF's 2001 CL55 has decided that the door locks shouldn't work.
When you press the remote buttons the alarm arms and disarms as usual, but the locks don't respond.
I'm assuming that one of the lines back at the pump is stiff/brittle and without the flex it's letting air escape. (Once the day warms up the locks work normally.)
On my W210, all we have is the PSE pump under the back seat and that runs everything. However, her car has a PSE pump under the battery, and then there is the large vacuum pump in above the LR wheelwell.
I've poked around in the EPC and haven't been able to discern what the driving force is in this thing.
So my questions, if you pros don't mind:
1. Which pump supplies the air to energize the door locks? The PSE or the vacuum pump?
2. Whichever one it is, has anyone taken one of these apart to inspect/replace lines/connections? (The W210 PSE pump can be disassembled and there is a main internal tube that turns brittle and leaks, then nothing works.)
Any other information you can provide would be much appreciated.
Thanks and enjoy the ride,