A guy in a pickup blasted one of these a while ago in front of me in Ft. Myers. I just about shat myself. I wanted to pull him over to suggest he not use that in Ft. Myers - the average age is 85 and he could've caused heart attacks!
It's a momentary alarm switch, not a latching switch for a courtesy light.
If hood is opened while alarm is on, it triggers the alarm.
It is feasible to break into the car when it is locked by opening the hood and applying pressure to one of the vacuum lines, which pops the door locks. So MB fitted an alarm switch to protect this possible entry point.
I was told by an AA guy that this was the favoured way for the car thief on early models. Open hood; dispatch the under hood siren (if fitted); pop the locks; bypass the immobiliser (if fitted).
It looks like the early cars have this switch fitted regardless of whether the MB alarm option is fitted or not, so in some cases it could be regarded as redundant.
My '92 500SL was fitted with the MB alarm option, but the immobiliser was unreliable (intermittently couldn't start car!) so I fitted a Clifford alarm, which also utilises the switch.
While I removed the old MB alarm I found that the blue wire from the drivers door lock to the central locking pump in the trunk had been purposefully cut down by the seat, presumably as part of the original MB installation (?). In practical terms this meant that the drivers door latch would not operate the central locking until I reconnected this wire. Worth bearing this in mind if anyone has similar problem. Check continuity of blue wire between door latch switch and connector to pump in trunk. But I digress.
Question? My 1995 SL320 has developed an erratic dash engine coolant temperature gauge. After warming up the gauge reads normal, then after a few minutes the gauge jumps to extreme hot then after a few minutes it reads normal again. This erratic gauge behavior repeats about every 5 minutes...
Ok, where to begin. Well I owned a 1991 500SL since 2007 now. The cars ADS was deactivated by a previous owner. After 12 long years I finally restored the system back in the car. It wasn't cheap nor easy, and I've yet to enjoy it as it has a MIL ADS dash light on
I bought a lot of components...
Renewing the hydraulic system fluid every 2-3 years or 25K miles should extend the life of many of the hydraulic system components. This is not a part of Mercedes prescribed maintenance, so most cars are still running around with the original fluid (plus years of accumulated contaminants).
Hello all, in my parts manual, many times searching for parts, I see "except code 806". I cannot find what that code is. ( code "806 O" is "lime green", which would have nothing top do with suspension, for example}
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