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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car is losing power and shaking

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: There is fluid that looks like a chocolate milkshake in the radiator

This is generally a sign of a blown cylinder head gasket. When the cylinder head gasket is compromised, this allows oil to leak into the coolant system, creating the chocolate-like substance that you see in the radiator. When this happens,...

Q: "no check engine light" missfire changed fuel filter spark plugs and air filter car wont accelerate past 20 mph even with foot to

You should have the computer scanned to see if there are stored codes. If no codes then check the air filter is not plugged and air filter housing is not blocked from getting fresh air in to it. You will...

Q: Q: Car not shifting out of park

A common issue is a faulty brake light switch. The switch controls two circuits one for the brake lights themselves and the other tells the transmission the brake is depressed and it is ok to shift out of park. Another...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.