I have two questions, but I just wanted to post them at the same time.
The car in question is a 1991 300D 2.5, with 175K and all the service is up to date and never done late.
1. I park the car in my garage and I smell a faint wiff of diesel fuel, if I bend down near the grill. The car does not have any leaks anywhere, and I did check very thoroughly from above and on a lift. Anythoughts?? It is not strong, but I was putting stuff on a shelf, in front of my car and when I bent down I smelled it.
2. My car puffs a little bit of blue-grey smoke at idle. If this was my race-car (1989 Mustang Lx 5.0, run's low 11's) I could definately say that it was oil being burned, but the car does not consume even a drop of motor oil. I think that it is just burning a tad too much diesel fuel. Since diesel fuel is essentially oil, could this be my answer?
Aside from that, the car is an absolute pleasure to drive.

Thanks and remember to keep telling everyone about this sight. Even if they do not have a MBZ, they will learn a lot about cars.

CJ, just curious if you checked the rubber hoses that run in between the injectors. On my 240D, I could smell raw fuel as soon as my wife pulled in the driveway recently, but when I went to look for a leak the next day, I couldn't find one. So I temporarily sprayed a little cheapo paint on all of the fuel lines under the hood & drove the car around town for a while ... came back & I still couldn't find a leak. I drove it on the interstate ... came back & I had VERY small stream of fuel (& cheapo paint - which made the leak obvious) coming from the end of the hose on the #4 injector.

As far as the blue smoke, have you had a thermo recently? If your not burning any oil, then blue smoke is usually a sign of unburned /under-burned fuel ... which would also drop your MPG's. My guess would be the thermo since you don't have any other obvious symptoms.

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1980 Mercedes 240D
1982 Mercedes 300SD
1985 Mercedes 300D
1993 Dodge Cummins Turbo Diesel

What is a thermo?
P E H

Excuse the shorthand ... Thermostat.

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1980 Mercedes 240D
1982 Mercedes 300SD
1985 Mercedes 300D
1993 Dodge Cummins Turbo Diesel