Mercedes-Benz A220 2020 Technical Service Bulletin # LI54-30_P-049068 Date: 100311

Instruments - Tachometer Fluctuates By Approx. 100rpm

Instrument cluster: Tachometer fluctuates

Topic number LI54.30-P-049068

Mercedes-Benz A220 2020 Page 387

Version 1

Design group 54.30 Instrument cluster/display instruments/warning devices

Date 03-11-2010

Validity Model 204 with comfort multifunction steering wheel (code 442) up to VIN ...A 324554 / ...F 383728 / ...R 091855

Model 207 up to VIN ...F 014219

Model 212 up to VIN ...A 079696

Reason for change

Reason for block

Complaint:

Tachometer in instrument cluster (A1) fluctuates by approx. 100 rpm.

Note:

The complaint is observable primarily when idling.

Cause:

Dirt in the tachometer stepper motor in the instrument cluster (A1)

Remedy:

Check the engine speed on cold start and in warm-up with Xentry Diagnostics under Motor electronics (ME) control unit -> Actual values ->

Combustion engine. If the engine speed in the actual values is constant and the tachometer in the instrument cluster (A1) fluctuates,

remove/install/replace instrument cluster as per EPC (A1).

Symptoms

Work units

WIS-References

Mercedes-Benz A220 2020 Page 388

Mercedes-Benz A220 2020 Page 389

Mercedes Benz E 63 AMG Sedan Instruments - Tachometer Fluctuates By Approx. 100rpm

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2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 1
Vehicle: All Technical Service Bulletins
Instruments - Tachometer Fluctuates By Approx. 100rpm
Instrument cluster: Tachometer fluctuates
Topic number LI54.30-P-049068
Version 1
Design group 54.30 Instrument cluster/display instruments/warning devices
Date 03-11-2010
Validity Model 204 with comfort multifunction steering wheel (code 442) up to VIN ...A 324554 / ...F 383728 / ...R 091855
Model 207 up to VIN ...F 014219
Model 212 up to VIN ...A 079696
Reason for change
Reason for block
Complaint:
Tachometer in instrument cluster (A1) fluctuates by approx. 100 rpm.
Note:
The complaint is observable primarily when idling.
Cause:
Dirt in the tachometer stepper motor in the instrument cluster (A1)
Remedy:
Check the engine speed on cold start and in warm-up with Xentry Diagnostics under Motor electronics (ME) control unit -> Actual values ->
Combustion engine. If the engine speed in the actual values is constant and the tachometer in the instrument cluster (A1) fluctuates,
remove/install/replace instrument cluster as per EPC (A1).
Symptoms
Work units
WIS-References
2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 2
2010 Mercedes Benz E 63 AMG Sedan (212.077) V8-6.3L (156.985) Copyright ? 2013, ALLDATA 10.52SS Page 3
Validity