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Home >> Mercedes Benz >> 2019 >> C300 4Matic, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 346 (Engine Cooling System - 253 Chassis) >> Testing & Repair >> Remove/Install Low-Temperature Circuit Switchover Valve - AR20.00-P-1050MRA

Remove/Install Low-Temperature Circuit Switchover Valve - AR20.00-P-1050MRA

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Engine 274 in model 205, 253 

with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) 

Shown on model 205 

Fig 1: Low-Temperature Circuit Switchover Valve Components Location - Engine 274 In Model 253
G14474314Courtesy of MERCEDES-BENZ USA
WARNING Risk of injury  to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning  from swallowing coolant. Do not open Cooling system unless coolant temperature is below 90°C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.
AS20.00-Z-0001-01A 
Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Remove front lower engine compartment paneling.   AR61.20-P-1105LW
2 Drain coolant of low-temperature circuit.   AR09.41-P-6834LW
3 Remove screws (2).    
4 Remove coolant lines (1) at low-temperature circuit switchover valve (Y73/1) and seal openings with suitable protective covers.   AR20.20-P-7441-01RQ 
    REMOVING Set of protective covers Fig 2
5 Remove low-temperature circuit switchover valve (Y73/1) until electrical connector is accessible. NOTES
Do not crush or kink or subject electric lines to tension.
This will result in damage to the electric lines and can impair their function.
 
6 Release and disconnect electrical connector a low-temperature circuit switchover valve (Y73/1).    
7 Install in the reverse order.    
Fig 2: Identifying Set Of Protective Covers (001 589 01 91 00)
G07742161Courtesy of MERCEDES-BENZ USA