SRS issue(?) '87 300SDL - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 01-05-2014, 07:48 PM Thread Starter
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Date registered: Jan 2014
Vehicle: 87 300SDL
Location: United States
Posts: 1
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SRS issue(?) '87 300SDL

This is my second Benz, the first an '83 diesel wagon..sold it to a guy on a commune. Hippies.

My '87 300 SDL has a re-built engine in it, my families mechanic rebuilt it after buying it from a customer who blew the turbo. Anyway, my dad drove the car a few years before getting a different car, and this one sat for a little over a year. They claim to have gone out and started it once a week or so, and it started up just fine on a cold morning, a little rough, but smoothed out quick and I only hit the glow plugs once.

I bought it from them, and drove it six hours home. The spring that holds belt tension on the alternator broke on the drive, so I had to find one and put it on before driving it again. I got one, and left the next day for Austin, TX, from NC.

This car is a highway king. It takes a while, but once you reach traffic speeds this thing cruises. It's like driving a couch. Very nice.

A couple of things happened on my trip, about six tanks of diesel and 2k miles. I ordered the seat rebuild kit from while on the road, and had it delivered to my destination address. The kit that this guy made is well worth the money, it comes with everything you need to fix sagging old seats, and the drive was much more comfortable. The kit advertises that it will only include enough to fix one seat, but mine were not terrible so I was able to fix both front seats without any specialty tools in a friends living room.

So....after re-installing the drivers seat, I test drove it around. Went back to where I was staying and the car sat for a few days. When I cranked the car on the morning I left TX, the SRS light came on, and the ignition buzzer did not chime, (can't say I care too much). I did not pay it much attention, and turned the air on and went back inside to let it warm up.

After getting on the road, I tried to turn the heater fan off, but it wouldn't turn off. Hit all the buttons a bunch, punched the dash a few times....nothing. Half an hr goes by driving and the fan just kicks off, and will not come on again. Luckily, it's just the high volume fan, and the low speed fan still works. Another couple of hrs go by, and something smells like burning plastic. Sure enough, I start to see smoke coming in from behind the temp. control. Pull over, check it fire...just a short I guess.

Super long write up, but the SRS is the restraining system built into the car right? Does messing with this system do anything to the rest of the electrical system? Why would the fan behave like that?
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