Q: Power windows will not work when you turn the car on

Hello there. It does indeed sound like something may be going on with the transmission for your 2001 Mercedes Benz CLK430. The most common causes of shifting poorly would be a low fluid level (https://www.yourmechanic.com/services/transmission-fluid-service), transmission linkage, shift solenoid (https://www.yourmechanic.com/services/downshift-solenoid-replacement)...

Hi, thanks for writing in. If your AC system is leaking and it will not accept a charge it is either because the AC system is overcharged or it is leaking (https://www.yourmechanic.com/article/how-to-find-the-source-of-an-oil-leak-by-ed-ruelas). Both of these symptoms will cause the air...

This may be a sign of a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a transmission solenoid, which directs transmission...

This sounds like you may not have any power going to the fuel pump relay (https://www.yourmechanic.com/services/fuel-pump-relay-replacement). The relay wires should have ground on two wires, power on one wire and switched power on another wire. To activate the fuel pump...

Hi There, It sounds like you may have a couple of different issues. The idle problem may be a result of a dirty or faulty idle air control valve. The idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) monitors the air intake as...

It could be that you have a problem with the throttle motor. Gone are the days when the link between the pedal and the engine was a physical cable. The movement of the throttle valve is now done by a...

Sport mode is a software feature. When the car is in sport mode, some of the engine tuning parameters will change and the transmission shift points will be higher to emphasize performance over fuel economy. There won't be any affect...

Based upon the symptoms you are describing, it sounds like you may have a faulty camshaft position sensor. The camshaft position sensor is a magnetic sensor that monitors camshaft speed to regulate ignition timing and fuel injection timing. It gathers...

This problem of erratic idle speed is often referred to as "surging" or "hunting". The causes include a faulty idle air control valve or circuit (IAC), a faulty ECM (not common), faults in the fuel pump control circuit, defective spark...