Can you post a Photo?
If you let your car sit for a longer time (how long depends on the condition of your battery) it's cerainly worthwile. Mine can sit without charging for at least 1-2 weeks. CTEK is very good, OEM supplier for batterchargers for Bentley, Ferrari and Mercedes. Only difference is the logo and price. Never seen them with lights on the connector. They probably are an indication of the battery condition is my guess.thanks guys. Had just noticed Ctek on the plug and looked it up. Previous owner must have taken the charger but left the wiring. Worthwhile buying one??
...or Float (float charge) as one member would say.Always Trickle:smile: