1990 Mercedes-Benz 300SL Questions

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It's been sitting for a few years however I covered all the basics to get it running, fluids, battery etc, haven't replaced any parts yet except for the battery, the issue I'm having is that it starts and runs fine until it warms up then just stalls out any information would be helpful. I'm leaning towards a sensor issue but this model doesn't seem to have many.
mid day. gages or normal. mornings and nights just fine
The meters are going up and down sometimes. Eventually it may brake down completely some workshop guy told me.
Any tips for what to do? Is he right? What will be the price for a new or used one?
car has approximately 140,000 miles, just changed the transmission filter and fluid. Then 3 week later it car stop going into reverse when it's cold.
It just started this about a week ago. I checked the fuse box and all the fuse are good. I push the roll bar back in place and as soon as I make a turnthe roll bar comes up. Is this a problem that a should be concerned about?
The hard top is on when I make the turn.
Red light is on.
No cold air.
A/C is not cold.
I have no problems till I did a retrofit on the air conditioning . Now car stall every 15 minutes it is a 1984 Mercedez 2 dr. 390 sl gas. Someone says timing or an o sensor I don't really know if it is these things?
all the freaking timr
air condition blows warm air fully charged with freon
Hello i have a 90 sl 300 and it starts up and idles fine but when i start to drive it it has no power to get over 50 unless i feater the gas. I have chage the fuel pumps,flow sensor, plugs, and both converters.
I installed a heater blower motor in my 300sl. And the motor only blows on the lower speed. When i first installed it the motor blew on all speeds. After five minutes in only blows on the first speed..
soft top does not open. Replaced switch control modual was
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