My 1995 E200-124 has just been tested by a Mercedes-Benz dealer and these
are the results.
1. Star Diagnosis test: no readings.
2. Analogue diagnostic test: no readings.
3. Handheld scanner: complete readings, except for SRS control unit.
Therefore, the dealer is maintaining that the fault must lie with the
control unit. This will cost roughly UKP 750.00 (USD 1400.00) to rectify.
The independent specialist I have been using couldn't trace the source of
the fault, using test methods 1 and 3. During their investigations, they
swapped my control unit with their garage 'loaner' (an older E300) and
claimed that my control unit worked perfectly well in the other vehicle,
i.e. the SRS light didn't appear.
So, on the one hand, the dealer claims that I need a replacement control
unit whilst the independent specialist says otherwise. Can anyone explain
this diversity of opinion?