2004 E500 ignition problem!
You stated that it wouldn't start when you got it home, how long was it parked before you tried starting it again?
Do a search. You can buy them online (Ebay, etc.) for about $40-$50.
It's about a 10 minute job so if you are capable with tools, do it. Otherwise the dealer will rob you.
You will need a E8 torx socket.
PM me if you have more questions or need help.
Gary
Did it work? I guess it is time for me to replace mine - I had this issue twice in 2 weeks time frame. Also I get Check Engine light after that for a while…
Dealer price for the sensor $163.02.

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And something tells me that original poster had the same symptoms.
The only question is – is the sensor goes bad or just dirty?
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Yes, is you know where it is
- 15 min. Just had to cut some strips to get those wires out of the way. Buy the way, somebody say it is easier doing it from the bottom - don't see how...




