Skip the auto shop - Our mechanics make house calls

Q: Car is losing power and shaking

asked by on

I have a 1998 Mercedes Benz c230, it feels like the u joint is bad, viberates real hard right under the center console, but also now the car wont take off as fast, uses way too much fuel and when it viberates , sometimes it viberates so hard the engine will shake. Im not sure if this is just one problem or more than one. The air filter is bad, I need to change it, oil is good, im not sure on spark plugs im sure they are not too good. Car has over 126k on it. Sometimes when I hit the gas it gets loud but barely pulls. Also there is a tone of oil under the car, most of the undercarriage is covered, its not motor oil. But there is no way to chek the transmission fluid with out taking it to a dealer,, any advice on what may be the problem?

My car has 260000 miles.
My car has an automatic transmission.

A: Hello. Your intuition is correct. Your vibr...

Hello. Your intuition is correct. Your vibration is caused by a failing "flex disk", a large rubber and steel "doughnut" which connects the transmission and driveshaft, and acts as a u-joint to allow flexing as the engine and transmission move about. Once this disk starts to deteriorate, it can fail quickly, so don’t delay having it replaced. The transmission fluid CAN be checked on your C230, even by you if you are a DIYr. This is a filler tube at the rear of the engine, but there is no dipstick and requires you to buy a "service tool" (really a dipstick-like metal rod), which is temporarily inserted into the filler tube to check the transmission fluid level. By all means, have the fluid level checked as soon as possible. A low fluid level could well be the cause of poor acceleration, and could be causing damage to the transmission. If you would like to have this checked for you, a certified technician from YourMechanic can come to your car’s location to inspect the loss of power and vibration problem in person so that this can be corrected.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car sluggish and hearing noises from engine

Hello. The most common causes of low power and noise on this engine are either a failing catalytic converter, or more commonly, a failing timing chain or variable timing actuator. Both of these are very common problems with this engine....

Q: I accidentally drove through 2 feet of water, I have replaced several parts but the car still runs poorly

You did not mention replacing the air filter after it got wet. The engine and its sensors were not designed to go through water and will get damaged. You may have also damaged internal engine parts like bending engine piston...

Q: Turn off consumers low battery

You will want to have the battery charged and load tested before replacing it. Since you have already replaced the alternator, the battery replacement is generally the cure for the "turn off consumer low battery" warning light. You may want...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...