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Home >> Mercedes Benz >> 2017 >> C300 Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Mixture Formation - 205 Chassis - 1 Of 2 >> Testing & Repair >> Remove/Install Throttle Valve Actuator >> Remove/Install Throttle Valve Actuator - AR07.61-P-1401MRA

Remove/Install Throttle Valve Actuator - AR07.61-P-1401MRA

Engine 274.9 in model 205 

Engine 274.9 in model 253 

Shown on engine 274.920 in model 205.042 

Fig 1: Throttle Valve Actuator Components Location - Engine 274.9 In Model 205 (Shown On Engine 274.920 In Model 205.042)
G12934058Courtesy of MERCEDES-BENZ USA
WARNING Risk of injury  to skin and eyes suffering scalding from contact with hot coolant spray. 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
  Notes on coolant level   AH20.00-P-1142-01CW
REMOVINGINSTALLING Remove/install     
1 Remove upper engine cover INSTALLATION IMPORTANT Only install upper engine cover after the leak test.  
2 Remove pressure in the low-temperature circuit    
3 Remove coolant vent line from charge air cooler (1) and close off connections using suitable stop plugs SPECIAL TOOL Hose clamp pliers Fig 2
    SPECIAL TOOL Record plug Fig 3
4 Remove charge air cooler (1) and place with attached lines and hoses to one side   AR09.41-P-6819MRA
5 Release and disconnect electrical connection of throttle valve actuator (M16/6)    
6 Remove screw/bolts (3) and take out the throttle valve actuator (M16/6) INSTALLATION IMPORTANT Tighten screw/bolts (3) in diagonally opposite sequence.
INSTALLATION IMPORTANT Replace seals and make sure that the seals are seated correctly.
TORQUE SPECIFICATION Bolt, throttle valve actuator to charge air distributor
*BA30.20-P-1002-01C 
7 Install in the reverse order    
8 Check coolant level and correct FLUID SPECIFICATION Coolant mixing ratio *BF20.00-P-1001-04A 
9
REFER TO SELF-DIAGNOSTIC SYSTEMS
Read out and erase fault memory   AD00.00-P-2000-04B
WARNING Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running. Secure vehicle to prevent it from starting off by itself. Wear buttoned-up and snug-fitting work clothes. Do not touch hot or rotating parts. AS00.00-Z-0005-01A
10 Carry out an engine test run, checking the engine for proper operation and leaktightness
ELECTRONIC ACCELERATOR ACTUATOR

Number Designation Engine 274
BA30.20-P-1002-01C Bolt, throttle valve actuator to charge air distributor Nm 6
COOLANT MIXING RATIO

Number Designation Engine all (4xWD, CAR, smart)
BF20.00-P-1001-04A Coolant mixing ratio Antifreeze/water Up to -37°C % 50/50
As of -38°C % 55/45
Overview and specifications sheet   BB00.40-P-0310-01A
References to sheet specification   BB00.40-P-0310ZZ
Fig 2: Identifying Hose Clamp Pliers (003 589 03 37 00)
G12934059Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Record Plug (129 589 00 91 00)
G12934060Courtesy of MERCEDES-BENZ USA