Thanks MB DOC - one final question - is this just a fluke (doesn't sound like it) and can I expect the new switch to last any longer than the original (had a similar issue with the wipers at around 44K but then it didn't act up for 27K later.
Cheers, Socks E420

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SocksE420
97 SL500 74K
96 C280 110K(SOLD)
96 E320 111K(SOLD)
95 E420 107K(SOLD)
88 300TE 142K(SOLD)
77 300 D 144K(SOLD)