1. Do glow-plugs get "weak"? I have a 1984 300TD, 105,000 miles. It has
begun to not fire on one cylinder when starting cold. It goes like this for
10-15 seconds and then starts firing just fine. Once the engine is warm
there is no mis-fire. Ths seems like the classic symptom of a failed
glow-plug. I have checked the continuity according to the procedure in the
manual and they all check good. Do glow-plugs wear out gradually? It would
seem they are either on or off with no in-between. Is there something else
2. How often should valves be adjusted? I have heard every 5,000 miles. That
seems like overkill for a vehicle like this. But I have not been able to
verify this anywhere.
3. I have heard of these manuals on CD that Merc (MB-USA) is offering. I
recently borrowed a Mercedes-Published hard copy shop manual from a repair
shop ("Service Manual Chassis and Body Series 123, Volume 2" with a blue or
turquoise soft cover, a very shop-like color). I am trying to find out if
all the info in this book is contained on the CD. I have called MBUSA twice
with this question. The first Product Advisor told me the CD is strictly for
the do-it-yourself'er who will do only the most superficial work on the car.
Another advisor said that, with the exception of the automatic transmission,
of the info in the hard copy manuals (Which is more than enough for my
purposes) is on the CD. The confusion is made very poignant by the fact that
Merc will NOT accept returns of the CD and it costs about $110.
The agent told me that the CDs have been reworked recently so the documents
are NOT in Adobe Acrobat format anymore. All you need is a web browser. If
the info is complete, these CDs are a dream come true.
Has anyone out there seen one of these CDs?
4. The vinyl trim of the interior has dried out and wrinkled. I have been
able to smooth it back out using a heat gun. What is the best glue to use to
re-attached the vinyl?
This is a great car. I inherited it from my mother's estate. We were conside
ring a mini-van or station wagon for our family and fortunately realized
that keeping this car would be enormously cheaper to maintain and it would
probably be as reliable (or more so) than a new car. It's a grand
automobile. But, hey, who am I talking to...?
Happy Holidays and thanks very much in advance,