Moin people, on my 116i 2009 N43B20 the control chain was to be changed. Costs according to KVA 600€, then according to the call it should suddenly cost just over 1000€. Today I was called and said the car was finished. There was first told me the engine had run out during the test drive and now is stuck and would cause me further costs, because they have to take the engine apart now. The engine was in a 1a condition, only the chain was slightly hung, was also I wonder what they have done, that the engine is completely fixed. They claim that the 5W40 engine oil used is to blame, or that fine plastic residues from the old sliding rails of the control chain could have blocked the oil channels. What can I do now? Do I have to sue them? Do I have to sue the Rech to pay for the tax chain of over €1,000?