johannes_koehler4
Mercedes CLK Diesel Heating Problem
Summary of the thread
A 2006 Mercedes CLK diesel is experiencing insufficient heating output, with an error indicating a potential defect in the water valve. A faulty cable or plug connection is considered as a possible cause. A similar issue was resolved by replacing the water valve, which restored normal heating. Checking the engine coolant level is also suggested, as low levels can mimic valve issues. The owner has scheduled a mechanic appointment to replace the defective water valve.
Did this summary help you solve your problem?
4 comment(s)
johannes_koehler4 (community.author)
I will check the engine coolant level. Could you provide more specific information regarding the location of the water valve and the nature of the error you encountered?
horststar3
It's somewhere along the heater core hoses. Honestly, without getting too technical, I'd recommend taking it to a workshop. My problem was definitely the water valve. The mechanic replaced mine, and the car heating was back to normal. Sounds like yours is failing too. If it is the valve, budget around 95€.
johannes_koehler4 (community.author)
Understood. I appreciate the information. I have scheduled an appointment with a qualified mechanic. They confirmed the defective water valve and will proceed with the replacement as suggested. Thank you.
rmh_community_comment_box_header
community_crosslink_scanner_headline
community_crosslink_scanner_intro
community_crosslink_scanner_title
community_crosslink_scanner_price
community_crosslink_rmh_headline
community_crosslink_rmh_intro
community_crosslink_rmh_title
community_crosslink_rmh_subtitle
community_crosslink_rmh_brand
MERCEDES
community_crosslink_rmh_model
CLK
horststar3
Water valve issues are common on these. I had a similar problem with my CLK: reduced car heating, error codes. It turned out to be exactly what you suspect, the water valve. Have you checked the engine coolant level? A low coolant level can mimic a bad car valve.