Wheres the bleed screw on radiator for my 98 mercedes slk230

your windows move first , check fuses and clean your window may be sticking due to dirt.

P0417 - Secondary Air Injection System Switching Valve "B" Circuit Shorted.

Possible Reasons:
- Faulty Air Pump inoperative
- Air bypass solenoid harness is open or shorted
- Air bypass solenoid circuit poor electrical connection

How is the code detected?
The DTC P0417 is detected the the AIR vacuum control solenoid circuit not operating as desired by the PCM.

Indications/Symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine hesitation

P0417 Description:
An air pump is used on the vehicle to lower tail pipe emissions on start-up. The Powertrain Control Module (PCM) grounds the Air pump relay control circuit which energizes the Air pump. The PCM also grounds the Air combination valve vacuum control solenoid circuit, which energizes the Air vacuum control solenoid. Vacuum is then applied to both Air combination valve diaphragms which opens the shut off valves. The PCM enables both circuits simultaneously when Air system operations id desired. When the AIR system is active, then Air pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR combination valves replace the conventional check valves. When the AIR system is inactive the shut off valves prevent air flow in either direction.

Here is the the Fault Code Manual. See page #33

http://www.motodok.com/Documentation/Files/MB/mb-dtc-manual-98-00.pdf

There is a couple of places it could be under the bonnet is one the other is on the door piller

Mass air flow sensor is dirty. Try cleaning it.
You can search that on youtube for a video that will walk you through it step by step.

I owned an SL 500 with the same issue. The auxiliary battery went out ( during warranty )

ck here they tell and have some pics.


https://www.pelicanparts.com/techarticles/Mercedes-SLK230/38-BODY-Rear_Center_Console_Removal/38-BODY-Rear_Center_Console_Removal.htm

where is the fuel pump relay located in a 1998 mercedes slk230?

the ecu socket is on the right side in engine bay it is a round screw off plug.

There's a bleed screw located at the bottom of the radiator. Open screw let fluid run out of radiator. Fill radiator with water run vehicle. Repeat above steps until fluid is clear. Use a coolant system flush. Refill system with appropriate amount of coolant and water.

you may just have an air lock in the engine water jaket,,bleed it out,, fill rat up,,,find top hose with bleed screw in it run up motor and undo bleed screw till only water comes out,,,keep rad toped up,,,job done?