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Mercedes 300D Suggestions

2231 messages,  Last post on Nov 11, 2009 at 9:21 AM

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What is this discussion about? Mercedes-Benz 300-Class, Engine, Fuel System, Diesel, Coupe, Sedan

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#83 of 2231 Paul29 by anibalb May 29, 2002 (12:09 pm)
Paul wrote:   The oil filter housing is on not in the left rear of the engine.   Ha ha ha. I appreciate that correction. English is my second language and I do that all the time. So am learning two things at once. Good to know that is the fuel filter. Knowing me, I probably would try to untighten it like an oil filter.   Once I find the oil Filter housing I will then see the oil cooler hose pipes. Great! I will look to see if they are leaking!   I am extremely interested in the car as it fascinates me quite a bit. Also, doing work with my hands is a great stress reliever and break from looking at a computer all day as my career demands. I very much look forward to doing the maintenance on it. Only one thing that scares me is valve adjustment. Would like to watch someone first, but can't exactly ask my mechanic for that.....
#84 of 2231 Paul 29---Tach by anibalb May 30, 2002 (7:28 am)
Paul,   I spotted the Tach sending unit. I unscrewed it and then put it back in and VOILA! Tach works again. I presume this will only be temporary and it will stop again. But at least that tells me that it is the sending unit not the Tach itself. I might try taking it off and getting some wire cleaner/dryer and cleaning it all up. Sometimes that works.   Can you do me a big favor and tell me what speed your 300 is going in the Highway when the rpms is exactly at 3. I am curious if my speedometer is well calibrated. It seems that when I am going only 65 I am passing a lot of people. So just let me know what the speed should be.   I also saw the oil filter casing. And attached are the hoses but they are aluminum and I thought that they were just rubber. In any event, I don't see any leaks at all. So am not sure if it was fixed and the Mechanic just forgot to delete that from the suggestions box in the invoice.   Soon I will test the brakes and booster. If I find glazed pads or something like that I might just do an overhaul and replace rotors pads and flush the fluid. Then I'll be sure it is all good!
#85 of 2231 anibald by paul29 May 30, 2002 (8:43 am)
Do not have the 300dt now, sold it some time ago. Your speedo could be out if the rear diff was changed . Different years/engines have different ratios but the housings all fit and look the same. To test your speedometer , go on a highway with mile markers, hold your speed at 60mph and with a stop watch or wrist watch , record the time it takes to go 5 miles . Should be 5 min.( 300 sec. ) . If it takes longer your speedo is registering fast , if it takes less than 300 sec. your speedo is registering slower than your actual speed . Note before testing set your tire pressure as recomended on the fuel fill door. As for the oil cooler lines, the flex section is at the oil cooler end of the lines , this is probably where the mech. noticed the seeping or leaks. I doubt if cleaning the tac unit will help , you will notice the a lot of the Benz connector pins/sockets appear to be silver plated . In any case they are the best quality connectors I have seen on a vehicle at that period of time. Also the tac sender electronics and pins are completely sealed from the elements when the cap is screwed in place. These cars were expensive and the buyer actually got what he/she paid for IMHO.
#86 of 2231 by sgrd0q May 30, 2002 (8:56 am)
Mr_Shiftright HOST said: IF you lift the hood of a GM car (which is a perfectly okay car for the money) you see lots of plastic snaps and plastic wire ties instead of bolts and nuts and metal fasteners, and lots of sealed units that cannot be disassembled; also lots of plastic tubing instead of steel or aluminum. You just stick your hands in some of the engine compartments and just the pressure of your wrists or arms breaks things.   I wonder if the new entry level Mercedes is as cheap...
#87 of 2231 by jrosasmc May 30, 2002 (11:56 am)
I think the current entry-level Mercedes cars are really really cheap.
#88 of 2231 by Mr_Shiftright HOST May 30, 2002 (1:12 pm)
Actually I haven't looked under the hood but I will and I'll let you know what I see under there.
#89 of 2231 I haven't looked under the hood, either. by haspelbein May 30, 2002 (1:29 pm)
I had one as a rental for a week. The interior materials are nice, and the powertrain with the 6spd is laudable. You can cruise quite nicely at high speeds without too much engine noise. I had no reason to look under the hood, though.   I can definitely say that it doesn't have the old Mercedes "tank feel" to it. But that is merely a personal preference.   My issue is rather, that for $30K, you a have a pretty decent set of competitive products.
#90 of 2231 by sgrd0q May 31, 2002 (5:35 am)
Thanks Shifty! Please let us know.
#91 of 2231 Power windows and sunroof by anibalb Jun 03, 2002 (7:29 am)
Hello,   In three of my power windows when I close them all the way and hold the button the motor stops working once the window is closed. However, one of them and the sunroof, the motor keeps going as long as I hold the button down. What do I need to do to fix that. Since the other 3 stop I suppose the fourth and the sunroof should do the same. Anyone have tips. Thanks.
#92 of 2231 by Mr_Shiftright HOST Jun 03, 2002 (8:18 am)
The sunroof motor doesn't stop automatically, you have to release the button.   Not sure about the power window...it SHOULD stop but I don't know if it can be adjusted to do so or if that's a defect in the motor itself. If adjustable, you'd need to look at the factory manual. If it's in the motor, I'd just live with it, it's a bit of a pain to change all that out.

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