Hi all,
The failure indicator lamp in the cluster on my 97 S600 lights up even after I changed all the rear bulbs to the specs. I have narrowed it down to the brake lights causing the failure and was wondering if there is anything else invoved other than the bulb. Thanks.

Sometimes the lamp indicator will come on even if the all bulbs are working. The bulb fault light electronics are very sensitive and replacement bulbs from Mcparts stores (Autozone, Walmart.....) can have enough of a current draw difference to cause the car to think it has a bad bulb. Try to find an exact replacement bulb and not an equivalent.

I had this happen on the brake light on my E320. Installing an exact replacement solved the problem.

J. M. van Swaay

Thanks for the reply, I'll give it a shot to see if that takes care of the problem.

I ended up buying bulbs from the dealer ($8/piece) and still the same problem. Is there anything else involved that causes the failure indicator to turn on other than the bulbs? Thanks.

walk around and inventory all exterior lighting: headlamp, parking lamp, city
light, bumper corner lens, 3rd brake light, license plate bulb....usually covers
the walk around. oh, also, the brake light bulb may have twin elements so
park in front of large window and step on brake and view reflection....and
operation of brake light.

__________________
-- raymond~
47º 34'N 122º 18'W

Ditto on that Raymond. I had a license plate light out. Also, the 3rd brake light gets intermittant when the heat gets to it.