W114 - W115 BUYERS GUIDE
What To Look For: Mercedes Benz
114 115 Common Repairs
1968 - 1976 Models
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| 240D | 250 | 250C | 300D
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for the Mercedes Benz 114 and 115 series
Mercedes Benz W114 - W115,
Buyers Guide, What To Look For, Common Repairs
These cars tend to be fairly bulletproof when treated
properly. Their values can vary greatly between 1,000 to
45,000 dollars depending on condition. However, a few
issues tend to rear their heads over time as these cars
age and mileage increases. So lets start with the
Checking The Actual
What you need to be aware of here is that many of
these models have an odometer that only goes up to
99,999.9 miles, therefore you need to investigate this
to see how many times it has rolled over. Owner and
repair shop records can help with this but don't be
afraid! Some of these models have been known to crank
along up to even a 5th rollover, 500,000 miles...
How Does It Run?
Running cheap fuel could cause problems with the
carburetor so check to make sure it purrs like a kitten.
The solex carburetors can be problematic and difficult
to tune. The twin solex or Zenith carburetors can be
problematic to adjust and synchronize. Also the
bi-metal-springs under the intake are prone to break and
cause trouble with either cold or warm engines.
Other items that could attribute to ruff running
could be the need to adjust valves, or replace the
timing chain which should be done every 150,000 miles.
What Is The Rust
Oh yes they tend to have healthy rust issues
depending on where they spent their life. Where do they
tend to rust? well, all over!!! Check the more common
areas like over headlights, the fenders, the floor,
floor boards and trunk. Check to see if the jack points
are still intact. A magnet can help determine where
there may be significant amounts of bondo fiberglass
The window seals and door seals are known to fail
over time causing water leaks to the rear foot wells
where the floor pans will rust out
Check To See If There
Are Demons Under The Dash
Make sure that the heater blower motor works properly
and that the bellow units that control the flaps to
switch from heat to A/C are working properly. The blower
motor, bellow units and vacuum leaks that are buried
deep under the dash would require dash removal for
repairs. This can be a 10-20 hour job so no doubt this
will effect the vehicles value significantly.
Transmissions Can Be
Automatic transmissions are designed to shift
differently under loads and often start out in 2nd gear.
Check to see if the trans is adjusted properly and
starts out in 1st when you floor it, then make sure it
doesn't up-shift too soon causing the motor to lag. This
can make quite a difference in performance.
Buyers Guide Checklist
- Odometers: With only five digits, the
true total mileage may be hidden. Complete service
records can confirm actual mileage.
- Rust: Check the structural components,
sub-frame mounts for the engine and rear suspension,
floors, fenders, above headlights, trunk, back
window, wheel wells. Structural rust can make it
- Rubber seals around windows and doors go bad
but they can be can be replaced, though the work
- Engine: Check the oil consumption, look
for coolant leaks and the overall condition of the
fuel system that could lead to costly repairs.
- Suspension: Look for lubrication on all
suspension components. Make sure suspension bushings
are not dry and cracked which would cause clunking
sounds and poor handling.
- Carburetors: These may need to be rebuilt
or adjusted, and over-heating can warp carburetor
- Heat AC System: Heaters, fans, fan-motor
bushings, and switches can be time-consuming to
replace due to under dash accessibility.
- Body Parts: Missing body parts including
exterior and interior trim are less likely to be
available so look for a complete car.
- Interior: Carpeting, dash covering,
headliner, and wood trim accents can be purchased or
refinished, but may be costly.
- Service Records: Good service records are
indispensable if you can get them, and the only real
record of possible hidden problems.
Final Notes For
Get out and drive the car to check, engine condition,
transmission operation and bearing noises, differential
clunking, axle noise, smooth handling, quiet braking,
tight non-sloppy steering.
Play with the controls such as heater, wipers, window
regulators. Inspect window channels, etc. If you buy it,
you have to live with it!
Try to find a clean vehicle in good condition by
comparing several. Finding one with service records is
best for knowing its history.
Emissions controls on 1975 and 1976 models make them
far more finicky. Models with California emissions are
Maintenance of these cars can be managed by
do-It-yourself owners that have basic knowledge of
adjusting valves, replacing points, plugs, and
condensers, changing oil and filters, and performing
basic transmission services.
U.S. Market - Index of Series W114 - W115 Mercedes
Mercedes Benz 114 - 115 -
W114 - W115 Models