Date registered: Jan 2006
Vehicle: 73 280SE 4.5, 71 300SEL, 03 BMW Z4, 72 Fiat 850, 80 Triumph TR7, 85 Porsche 911
Location: DC Area
Mentioned: 1 Post(s)
Quoted: 95 Post(s)
Strong smell of gas ... maybe a bad seal that was "sealed" with gunk. Or, as a guess, maybe the cleaner itself dealt the death blow to an already weak, though clean, seal. I used to have an MG with bad carb gaskets - I went to NAPA and got some gasket material (made for applications with fuels), traced the old ones, and cut myself a new set with an exacto knife.
The Mercedes Gods would be vengeful and sentence you to a Fiat if you did that, but it's something anyone can do, and it doesn't cost much.
Perhaps you have a hose that is leaking slightly. Yours is 32 yrs old - the rubber is bound to go bad some day. That's an easy fix too - go to an autoparts store and get some fuel injection hose (withstands higher pressure and will last longer). If memory serves, 5/8 inch is the size you'd need. And you'd need hose clamps for either end of the hose. Really, an easy fix.
After I fouled up my carb, I had to adjust the idle and a few other things. I ended up taking it to the local dealership, who took all day to set and balance the carb. They aren't known for their simplicity. Thus, I bought a Weber, thinking I could make better with a simpler, universal carb.
It was a bad decision. The Weber worked, but it wasn't designed specifically for Mercedes' - only the mounting plate was a special design. While the car ran OK, it was either running too rich, or too lean, and I could never get it quite right.
Hope this helps!