How do you reset check engine light on 2002 CLK55AMG ?

 

You can reset the check engine light using a hand held scanner and connect it to your 32pin port under your hood.
Your W208 may not have a 16pin OBD2 port under the dash.

 

Thank you for the tip, I will check that out, Regards, Michael

 

I use this device on all my cars because it's compatible with OBD1 and OBD2 cars.
I bought it from Amazon

 

Thanks for the tip. Can I ask you what fault code PO450 is please. Regards, Michael

 

You have a leak in your Evaporative Emissions System. This could be due to a leaking Evap line or as simple as a leaking petrol filler cap. Change your petrol cap first and see what happens.

I had this problem in my R129 and the check engine light went away after changing the petrol filling cap.

 

I am trying a new fuel cap and would like to inspect the evaporative vapor canister. I believe it is located above one of the rear wheels. Can you tell me which one ? Thanks, Michael

 

I can't help you because I didn't get that far.
Also, my car was an R129 that I am talking about.

 

Still working on my fault code PO450. I tried a new factory fuel cap, code still returns. Have inspected all of the evaporative lines and cans. Everything appears fine, any idea why this code returns. Where to look next ? Thanks, Michael

 

Still working on fault code PO450. I know it's an evaporative fuel issue. Can you tell me where to find the evaporative valve/ purge valve ? I have removed both inner fender wells and can't locate it.