Can't remember where wires go on starter motor on my Mercedes w203 C200 CDI 2004

Sounds like a switch problem, have to check for power in and out of switch,if ok check for power to wiper motor

One battery in the trunk.

They gave you the wrong one. Take it back.

If none of the set works, yes it could be the switch/bad wire/plug. If part of it works. Most likely the motor or cables at the motor are bad. You can probably buy the switch. The rest is salvage yard or the entire seat.

Go to any Pep Boys and get a Hanes manual for your vehicle.I personally have not heard of your situation.Didn't even know there was a separation in the fuel tank on your car.

readjust the sensor switch for the position of the boot or lock or replace it.

possibly I had a 190e and it gave no warning just whent in sainsburys car park replaced for 90 pounds all ok after this

Its possible the glow plugs when its warm the diesel is warm and starts more easily when its cold the diesle needs warming more so the glow plugs work harder in the winter only way i know how to test them is to take 1 out at a time turn the pre ignition on so the glow plug light comes on and the plug should glow red if not buy the 4 and replace the lot you could also check the wireing going to the plugs hope this helps ivan

Hi
It sounds to me like it could be a glow plug fault !
The glow plugs heat the diesel before it combusts. An easy way to diagnose this is check your exhaust after cranking on a cold morning if you have thick white smoke then you've probably got a glow plug down on 1 of your cylinders or maybe more
Hope this helps Nick

Hi Sayid, If you are not using it the container must be leaking. The most common causes are a broken pipe, a defective seal on the washer motor mount or the container is damaged and leaking. Regards John