rear suspension

Could someone please help me identify the correct springs to install. The problem is that the previous owner installed E class springs to cope with towing a caravan. so i don't have the correct colour code. After talking to my local steelers they said either three blue or two yellow spots...

Could the new rear shocks have been fitted incorrectly? ( To any who have driven, worked on or just know about r230 rear suspension partic. SL 350 ie non ABC modell) Hi to you all, Sorry about my long post. I'm generaly very pleased with the refinement of my 2003 350Sl 2003. I've only...