My '92 500e has an alarm system (Viper/Python?) - there is a red led and a button installed to the right of the light switch. The button is a clear plastic that emits a buzz when depressed and then flashes yellow then red. But this does not "arm" the system. The remote has two buttons with "python" embossed on the top and fcc ID ezsdei1491 on the back. "DEI" is embossed on the back, I replaced the battery and the red light flashes on the remote when a button is depressed. I tried to see if I could program the remote by pushing the dash button once, wait for the buzz, then holding the dash button and remote button one down simultaneously until a buzz. But I cannot arm the system.

Can anyone recognize what system I have from the above info? If so, How do I trouble shoot it? Is the "brain" under the left side rear passenger seat? I find the siren under the hood on the left side of the engine.

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1992 Black 500e
1991 Black 300te 4m
1992 Black Renntech 620sl
1979 Porsche 911sc targa

I had this same predicament when I bought my car.

My alarm "brain" was under the dash, on the driver's side. I took it to an alarm shop to see if they could locate it. So that's where mine is, and it's a fairly common place to put it.
I then bought a remote and had him program it to my car... don't ask how... I do not remember! You probably need it coded, I'd assume.

Good luck!

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2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

i would think you would want to take this question to the audio forum and seek the help of SCJLA.he seems to know everything about stereos and i'm sure he's up there with security systems as well.not that your not getting the proper advice,it's just that he seems to know everything.good luck-keep me posted

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'95 s500 (bought for wife but can't bear to share!!!) 125kms
'92 legend 180kms
'88 tbirdturbo(fantastic car-only regular maint.)120kms
'87 mustang gt(gone)
'86 tbirdturbo(gone)
'85 mustang gt(gone-but not forgotten)