HI ALL i put this problem in audio section and figured i would try in here too. i replaced the battery on my s500 and now have a dead radio...will not turn on and have no display,even the anti theft light does not flash. i have checked fuse no.24 under the hood and it is good...i also disconnected the battery for five minutes and reconnected and still nothing....am i missing something??? any suggestions would be much appreciated...thanks in advance
LOFTY
p.s. everything worked fine before i replaced the battery.

I think I remember there is a inline fuse behind the radio.
It is easy to pull radio IF you have those little radio removal tools
also you will need the radio security code

thanks a lot hal...i just ordered the removal keys from ebay...as soon as they get here i will let you know if that was the problem or not.(fingers crossed)....once again much appreciated.
LOFTY
p.s. i do have the radio code

And the assumption here is...the radio was working before you change out your battery? Was the old battery working before you changed it out? (i.e. reason for changing out battery?)

yes the radio was working fine before i changed the battery....battery was getting low and what with winter on its way decided to purchase a new one.

FYI, next time...check first with your local MB dealership parts department...these tools are not expensive and we do not need to buy time off eBAY....I got mine at the dealer for less than $3.00...no waiting.

Even the dash cluster removal tool can be purchase for around $10 at the dealership...so, don't go wasting your time on eBay for stuff like these.

Yeah, it's probably a good bet some where a fuse has blown.

well hal i removed the radio and the fuse is fine...i diconnected evrything behind the radio and reinstalled and still nothing...guess ill have to break down and take it to the dealer. thanks for your help..if you can think of anything else let me know
cheers
lofty

4 keys $4 and recieved them in 3 days so not too bad.........radio fuse under hood good...amp fuse in trunk good...fuse on back of radio good.....guess will just have to take to dealer unless anyone comes up with any other ideas.
thks
lofty

i meant fuse no.15 under the hood not fuse no.24

Mine had a bad capacitor on the back. I plugged it in to 12 V, lightly touched all the components on the back and I noticed it fired up. Found the capacitor for under three dollars, soldered it on and the radios been good ever since.

i got all most the same problem non mine w140 radio not working anti theft not flashing already repalce head unit and the amp, the fuses are all good what to do next or where did you find the capacitor

It's been a few years but as I remember, I removed the radio, powered it up with 12 V and begin touching each component on the back of the unit. Once I put my finger on the capacitor get started working intermittently. Once I replaced it, it was all good.

where exactly should is the capacitor and another thing when i open the switch the speaker make a popping noise !!

Just because I had a bad capacitor does not mean that is your problem. With my limited experience in electronics all I can tell you is look closely (under magnification of possible) at every component for discoloration or swelling. Also look at the traces for a short. I got lucky as I put my finger on each component to see if anything changes. Good luck.

i also put an aftermarket stereo on it it turns but doesn't sound at all