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.

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: Fuel or ignition problem.

If your complaint is a crank no start, it is likely that you have ignition problems. It could also be the fuel injection relay. The most likely cause for your no start is an ignition module in the distributor assembly....

Q: Car is making a loud noise coming from the air box because when u apply a little pressure the noise goes away and I just got a new

Hello, thank you for writing in. You are absolutely heading in the right direction. If you were to look at a diagram of the filter housing you would see it simply runs to the vents up front. If you can...

Q: I replaced my fuel pump 8 months ago

Policies on warranty vary from shop to shop. You would need to contact the shop that did the repair to determine if there is a warranty on the parts and/or the labor.

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.