Hi,
Got a CLA220d with the 2.2 om651.930 engine, it has around 70k miles on the clock and has been a very reliable car up to now.
The engine temperature runs at 60 degrees, it used to run around the 80-90 degrees c mark. It seems to have gradually done this over a couple months. It sat at 70 for a few weeks and now hovers at 60. There is heat getting into the cabin from the heaters so I don't believe it's air lock related.
When driven in a 'spirited' manner OR sat at idle, it does rise up to the 80-90 and get to temperature then drops back to 60 degrees when driven normally. I don't think it's sensor related as the sensor reads the temperature going up and down and shows it on the dash.
Is it likely to be thermostat related? I have heard that the water pumps on these are electric and regulate flow, is this true? There are signs of mouse damage underneath the engine cover... I'm hoping they haven't chewed through a wire that leads to a sensor or pump that regulates temperature or something like that. It has been to a garage and they noted that the live data from the car was reading erratically but don't feel comfortable taking it on as a job in case it is electrical related.
Seems odd that the live data reads eratically but the gauge on the dash seems to work normally. The thermostat on the engine is a conventional one with an engine temp sensor in the housing, no electric thermostat to open close. THERMOSTAT -->
Thanks for reading and thanks in advance
Got a CLA220d with the 2.2 om651.930 engine, it has around 70k miles on the clock and has been a very reliable car up to now.
The engine temperature runs at 60 degrees, it used to run around the 80-90 degrees c mark. It seems to have gradually done this over a couple months. It sat at 70 for a few weeks and now hovers at 60. There is heat getting into the cabin from the heaters so I don't believe it's air lock related.
When driven in a 'spirited' manner OR sat at idle, it does rise up to the 80-90 and get to temperature then drops back to 60 degrees when driven normally. I don't think it's sensor related as the sensor reads the temperature going up and down and shows it on the dash.
Is it likely to be thermostat related? I have heard that the water pumps on these are electric and regulate flow, is this true? There are signs of mouse damage underneath the engine cover... I'm hoping they haven't chewed through a wire that leads to a sensor or pump that regulates temperature or something like that. It has been to a garage and they noted that the live data from the car was reading erratically but don't feel comfortable taking it on as a job in case it is electrical related.
Seems odd that the live data reads eratically but the gauge on the dash seems to work normally. The thermostat on the engine is a conventional one with an engine temp sensor in the housing, no electric thermostat to open close. THERMOSTAT -->
Coolant Thermostat fits MERCEDES B220D 246 2.2D 2018 OM651.930 A6512000715 Febi | eBay
Type Thermostat, coolant. STC T431282. Passenger/LCV Vehicles. FIRST LINE FTK513. Compatible with the following OEM references. WILMINK GROUP WG1897477, WG2010809, WG2169419, WG2229125, WG2258092, WG2263946, WG2330594.
www.ebay.co.uk
Thanks for reading and thanks in advance
, which is a real shame as it would have saved me a fair amount of money, but it is what it is for now until the garage is built. It is booked in at a Mercedes specialist to be looked at, I think their first suggestion will also be like you've mentioned, try the thermostat and take it from there. Fingers crossed it is that, and nothing else!
