2005 S-Class W220 boot won't open, door switch inoperative

[JagFab]

I know, I know...this old chesnut...

- the fob LED flashes but boot stays resolutely shut
- the key blade from the fob turns so far but, even operating the lid push-switch at the same time as turning has no effect. Lots of advice to *really* turn the blade but I'm scared of breaking it.
- the door switch doesn't work. If it's relevant, the LED on that switch DOESN'T illuminate when pressed with ignition on
- fuses 57 and 62 in the rear footwell are OK (checked with a continuity meter)

I've seen videos on YouTube of people removing their license plate, removing the plinth and then the push-switch but...then what? Do I even have to go that far?

 

[Oldspanners]

Have you seen this?

 

[JagFab]

I hadn't seen that one, no! Probably because my search terms were 'S500' and/or 'W220'.

That's got to be worth a go. Many thanks!

 

[Wighty]

I hadn't seen that one, no! Probably because my search terms were 'S500' and/or 'W220'.

That's got to be worth a go. Many thanks!

Have you sprayed a load of lube into the lock ?
Try getting someone to push down on the boot when you operate the door switch it try the key ?

 

[Flyinspanner]

Really drench the keyhole with wd40, and keep wiggling it

 

[JagFab]

Thanks for the responses, everyone.

I should've made sure my edits had gone through before closing my laptop. I had added that I'd done the WD40 thing, as well as the pushing-the-key-up-while-turning thing...

I didn't get time over the weekend to investigate getting the plinth off. I'll hopefully get that done one evening this week.

Meanwhile, if anyone has any further inspiration...

 

[Craiglxviii]

Check for broken wires in the door harness....