Krzysztof87
New Member
Hi everyone,
I have heck of the problem. My cl203 220cdi recently started to drain battery over just couple of hours while standing. Problem started recently when visiting my family. While on the motorway I thought it would be good Idea to clean DPF, so did as per instructions, over 60mph for about 25-30min. I think it worked, coz found black particles on the rear bumper after I parked the car.
Then, I only been couple of hours at my family place but when returned and unlocked the car, lights only flashed for split second with strange click (like electric short-circuit) and opened just a driver door. Control light for the glow plugs didn't appear at all and soon after key event didn't turn anymore leaving steering wheel locked. I was completely powerless. Checked all the fuses but no fault found. Checked battery with multimeter - dead. Disconnected battery and charged over the night. Next morning after putting battery back I was able to switch on car as usual, then drove to the garage where they inspected alternator, which appears to be fine and charge as it should. Next I went to Halfords to check battery which I bought 5months ago - health check of battery ok and alternator Checked again ok. So I went home, was nice day so I've done headlamp restoration. It took me about two hours and when tried to test the light (restoration results) I found my battery dead again. I know it's a lengthy post but wanted to include as many details as possible. I understand there is possibility of parasitic drain but in just few hours?! Any ideas where to start from? I always like to try to fix/learn stuff myself or at least find the root cause of issue before handing over to the garage.
I have heck of the problem. My cl203 220cdi recently started to drain battery over just couple of hours while standing. Problem started recently when visiting my family. While on the motorway I thought it would be good Idea to clean DPF, so did as per instructions, over 60mph for about 25-30min. I think it worked, coz found black particles on the rear bumper after I parked the car.
Then, I only been couple of hours at my family place but when returned and unlocked the car, lights only flashed for split second with strange click (like electric short-circuit) and opened just a driver door. Control light for the glow plugs didn't appear at all and soon after key event didn't turn anymore leaving steering wheel locked. I was completely powerless. Checked all the fuses but no fault found. Checked battery with multimeter - dead. Disconnected battery and charged over the night. Next morning after putting battery back I was able to switch on car as usual, then drove to the garage where they inspected alternator, which appears to be fine and charge as it should. Next I went to Halfords to check battery which I bought 5months ago - health check of battery ok and alternator Checked again ok. So I went home, was nice day so I've done headlamp restoration. It took me about two hours and when tried to test the light (restoration results) I found my battery dead again. I know it's a lengthy post but wanted to include as many details as possible. I understand there is possibility of parasitic drain but in just few hours?! Any ideas where to start from? I always like to try to fix/learn stuff myself or at least find the root cause of issue before handing over to the garage.
Last edited:
. It's cl203 sub model of w203 in coupé body style. It's needed to be mention when ordering certain parts and just got used to.
