Remove/install BAS diaphragm travel sensor - AR42.31-P-6002EH

WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2016 Mercedes-Benz E63 S AMG, 2016 Mercedes-Benz E400, 2016 Mercedes-Benz E350, 2016 Mercedes-Benz E300, and 2016 Mercedes-Benz E250. However, it is still accessible from the selected car via links, so may be relevant.

MODEL 212.095/195 with ENGINE 276.9

MODEL 212.098/298 with ENGINE 651.9

Fig 1: BAS Diaphragm Travel Sensor Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Switch off ignition
2	Operate brake several times	In order to reduce the given vacuum in the brake booster BAS (A7/7).
3	Open engine hood and raise to vertical position		AR88.40-P-1000EW
4	Remove expansion rivet (3)
5	Unscrew nut (2) and remove strut (1) to the front	Nut, strut to suspension strut tower	*BA62.30-P-1006-02G
6	Detach rubber edge strip (5) from bulkhead (4)
7	Remove bolt (6) and push bulkhead (4) lightly towards engine until the BAS membrane travel sensor (A7/7b1) is accessible
8	Release and disconnect electrical connection from BAS membrane travel sensor (A7/7b1)
9	Spread retaining ring (7) using angled scriber (8) far enough (arrow) until the BAS membrane travel sensor (A7/7b1) can be pulled out to the front	Replace locking ring (7). Removal: Route angled scriber (8) at bottom left under the master brake cylinder (10) and position up against groove for retaining ring (7).
10	Pull out BAS membrane travel sensor (A77b1)	Make sure that the sealing ring (9) does not drop into the BAS brake booster (A7/7). Otherwise the BAS brake booster (A77) must be replaced. Push BAS membrane travel sensor (A7/7b1) far enough into BAS brake booster (A7/7) until the retaining ring (7) latches into place. Check sealing ring (9) for damage, replace if necessary.
11	Install in the reverse order
	Check
12	Start engine	Operate brake several times.
13	Turn off engine
14	Check leaktightness of BAS membrane travel sensor (A7/7b1)	Air flow noises must not be audible at the BAS brake booster (A7/7).

FRONT END WITH FRONT REINFORCEMENT

Number	Designation		MODEL 212
BA62.30-P-1006-02G	Nut, strut to suspension strut tower	Nm	30